zeropage is © by the L13-Crew, all part of TUI-NET


Am Anfang der Tabelle stehen einige Abkürzungen, die nicht zur IT sondern eher in das Alltagsleben oder den business-Bereich gehören, von denen ich aber denke, dass ein IT'ler sie dennoch kennen sollte.

0 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

ACK Acknowledge{d|ment}
ACME A Company that Manufactures Everything
AI Artificial Intelligence (see KI)
AKA Also Known As
APAC Asia and PACific
APEC Asia-Pacific Economic Cooperation
ARD Arbeitsgemeinschaft öffentlich-rechtlicher Rundfunkanstalten Deutschlands
ASAP As Soon As Possible
AT&T American Telephohne & Telegraph
ATM At The Moment
B2B Business to Business
B2C Business to Customer
BAM Business Activity Monitoring
BMBF Bundesministerium für Bildung und Forschung
BND BundesNachrichtenDienst
BPM Business Process Management
BTC Build To Customer
CEO Chief Executive Officer
CFM Cubic Feet per Minute (1,699 m³/h / 0,02832 m³/min)
CIA Central Intelligence Agency
CNN Cable Network News
CRM Customer Relationship Management
CSS Central Security Service
CTO Chief Technical Officer
DACH Deutschland, Austria, Confederatio Helvetica (Switzerland)
DENIC DEutsches Network Information Center
DIN Deutsches Institut für Normung
DoD Department of Defense
DPA Deutsche Presse-Agentur
EAN European Article Number
ECU European Currency Unit (nowadays EUR)
EDV Elektronische DatenVerarbeitung
EMEA Europe, Middle-East, Africa
EOL End Of Life
EOL End Of Line
ERP Enterprise Resource Planning
ESA European Space Agency
ETA Estimated Time of Arrival
EUR EURo, European Currency Unit (former ECU)
F&E Forschung & Entwicklung (see RnD)
FAQ Frequently Asked Questions
FeM Forschungsgemeinschaft elektronische Medien e.V.
HQ HeadQuarter
HR Human Ressources
INTELSAT International Telecommunication Satellite Organisation
ISBN International Standard Book Number
ISO International Organization for Standardization
IT Information Technology
KI Künstliche Intelligenz (see AI)
KMU Klein- und Mittelständische Unternehmen
MDF Marketing Development Fund
MFS Ministerium für Staatssicherheit
N/A Not Applicable
N/A Not Available
NASA National Aeronautic and Space Organisation
NDA Non-Disclosure Agreement
NFR Not For Resale
NSA National Security Agency
OEM Original Equipment Manufacturer
OGH Oberster GerichtsHof
OLG OberLandesGericht
PLU Price Look-Up code
POS Point Of Sale
RnD Research aNd Development (see F&E)
RMA Return Material Authorization
RoHS Restriction of the use of certain Hazardous Substances in electrical and electronic equipment
ROI Return On Investment
SKU Stock-Keeping Unit
SMB Small-to-Medium Business
SOHO Small Office, Home Office
TBD To Be Defined
TCO Total Cost of Ownership
TM Trade Mark
TTM Time to Market
TUI TU Ilmenau
USD United States Dollar
VC Venture Capital
VDE Verband der Elektrotechnik, Elektronik und Informationstechnik e.V.
VDI Verein Deutscher Ingenieure
1984 is it just a year?
23 is it just a number?
3DES Triple-DES
404 Page not found :)
AAA Authentification, Authorisation, Accounting
AAAA IPv6-A-record (DNS)
AACS Advanced Access Content System
AASP Adaptive and Array Signal Processing
ABC American Broadcasting Corporation
AC Alternating Current
AC'97 Audio Codec '97
ACAP Application Configuration Access Protocol
AceS Asian Cellular Satellite System
ACID Atomic, Consistent, Isolated, Durable
ACL Access Control List
ACPI Advanced Configuration & Power Interface
ADC Analog-Digital Converter
ADR Astra Digital Radio
ADS Active Directory Service(s)
ADSL Asymmetric Digital Subscriber Line
AEKE Augmented EKE
AES Advanced Encryption Standard
AFC Automatic Frequency Control
AGC Automatic Gain Control
AGP Accelerated/Advanced Graphics Port
aGPS Assisted Global Positioning System
AJAX Asynchronous JavaScript And XML
AKZ AmtsKennZiffer
ALM Application Lifecycle Management
ALOM Advanced Lights Out Manager
ALSA Advanced Linux Sound Architecture
AM Amplitude Modulation
AMR Audio Modem Riser
ANRS Automatic Noise Reduction System
ANSI American National Standards Institute
AP Access Point (WLAN)
API Application Programming Interface
APIC Advanced Programmable Input Controller
APM Advanced Power Management
ARC Advanced RISC Computing
ARGB Alpha/Red/Green/Blue
ARM Advanced RISC Machines (originally "Acorn RISC Machine")
ARM ARM Reference Manual
ARM Azure Resource Manager
ARMD ATAPI Removable Media Device
ARP Address Resolution Protocol
ARPA Advanced Research Project Agency
ARQ Automatic Repeat Request
ASCII American Standard Code for Information Interchange
ASIC Application Specific IC
ASM Assembler
ASN.1 Abstract Syntax Notation 1
ASP Active Server Pages (Microsoft)
ASP Application Service Provider
AT Advanced Technology
AT Attention
ATA Analogue Telephone Adapter
ATA AT Attachment
ATAPI AT Attachment Peripheral Interface
ATIM Announcement Traffic Indication Map
ATM Asynchronous Transfer Mode
ATP Active Turtle Pages (
ATX Advancec Technology Extended
AUI Attachment Unit Interface
AV Anti-Virus
AV Audio/Video
AWACS Airborne Warning and Control System
AWG American Wire Gauge
BASIC Beginner's All-purpose Symbolic Instruction Code
BEN BEstätigungs-Nummer (online-banking)
BER Basic Encoding Rules
BGA Ball Grid Array
BGP Border Gateway Protocol
BIOS Basic Input Output System
Bit Binary Digit
BLOB Binary Large OBject
BMC Baseboard Management Controller
BNC Bayonet Navy Connectory
BOFH Bastard Operator From Hell
BOOTP BOOTstrap Protocol
BRD Blu(e) Ray Disc
BRI Basic Rate Interface
BSD Berkeley Standard/Software Distribution
BSOD Blue Screen Of Death
BT BlueTooth
BTX ATX-successor
BTX BildschirmTeXt
C... Common ...
C64 Commodore 64
CA Certification Authority
CAD Computer Aided Design
CAD Control + Alt + Delete
CAL Client Access License
CAM Computer Aided Manufacturing
CAM Conditional Access Modul
CAN Controller Area Network
CAST Carlisle Adams and Stafford Tavares (symmetrische Blockchiffre)
CAV Constant Angular Velocity (LDs: 1500 rpm, HDDs: 4200, 5400, 7200, 10000, ... rpm)
CBR Constant Bit Rate
CC Cisco Certfied ...
CCC Chaos Computer Club
CCD Charged Coupled Devices
CCITT Consultative Committee on International Telegraphy and Telephony / Comité Consultatif International Télégraphique et Téléphonique
CCNA Cisco Certfied Network Administrator
CCM Client Connection Manager
CD Carrier Detected/Detection
CD Compact Disc (790 nm)
CD+G Compact Disc Graphics
CD-ROM Compact Disc Read-Only Memory
CDI Compact Disc Interactive
CDMA Code Division Multiple Access
CDN Content Delivery/Distribution Network
CDP Continuous Data Protection
CDV Compact Disc Video
CDR Common Data Representation
CELP Code Excited Linear Prediction
CERN Conseil Européenne pour la Recherche Nucleaire (European Organization for Nuclear Research)
CF Compact Flash
CF Content Filter
CF Contention Free
CFL Content Filter License
CGI Common Gateway Interface
CGI Computer Generated Image(s)
CGI Computer Graphics Interface
CGI die Firma [tm] (Company of Godin & Imbeau ?)
CH Channel
CHAP Challenge Handshake Authentication Protocol
CI Common Interface
CIDR Classless Inter-Domain Routing
CIFS Common Internet File System
CIM Common Information Model
CISC Complex Instruction Set Code/Computing
CLI Command Line Interface ("Shell")
CLI Common Language Infrastructure
CLIP Calling Line Identification Presentation
CLIR Calling Line Identification Restriction
CLP Command Line Protocol
CLR Common Language Runtime
CLV Constant Linear Velocity (CDs, LDs: 1500 rpm ... 600 rpm)
CMF Content Management Framework
CMF Content, Monitoring and Filtering
CMOS Complementary Metal Oxide Semiconductor
CMS Content Management System
CNAME Canonical Name (DNS)
CoDec Coder/Decoder
COM Common Object Model
COPP Certified Output Protection Protocol
CORBA Common Object Request Broker Architecture
CoS Class Of Service
CP/M Control-Program for Microcomputer
CPGA Ceramic Pin Grid Array
CPRM Content Protection for Recordable Media
CPU Central Processing Unit
CR Carriage Return
CRAM Challenge-Respone Authentification Mechanism
CRC Cyclic Redundancy Check
CRIMM Continuity RIMM
CRT Cathode Ray Tube
CSGM Certified SonicWALL Global Manager
CSM Content Security Manager
CSMA/CA Carrier Sense Multiple Access with Collission Avoidance
CSMA/CD Carrier Sense Multiple Access with Collission Detection
CSSA Certified SonicWALL Security Administrator
CTI Computer-Telephone Integration
CTS Clear To Send
D... Digital ... or Distributed ...
DAB Digital Audio Broadcasting
DAC Digital-Analog Converter
DARPA US Defense Advanced Research Project Administration
DAT Digital Audio Tape
DATEX-P DATa EXchange Packed switched
DAV Distributed Authoring and Versioning
DB DataBase
DBMS DataBase Management System
DC Direct Current
DCE Distributed Computing Environment
DCF Distributed Coordination Function
DCO Device Configuration Overlay
DCOM Distributed Common Object Model
DCS Dynamic Channel Selection
DDC Display Data Channel
DDI Direkt Dial-In ("ISDN-Anlagenanschluss")
DDM Dynamic Disk Management
DDoS Distributed DoS
DDR Double Data Rate (RAM)
DDS Digital Data Storage
DECT Digital Enhanced Cordless Telecommunications (ehem.: ... European ... Telephony)
DEE DatenEndEinrichtung
DeMUX De-Multiplexer
DEN Directory Enabled Networks
DES Data Encryption Standard (1977)
DF Don't Fragment
DFN Deutsches ForschungsNetz
DFS Distributed File System
DFS Dynamic Frequency Selection
DFÜ DatenFernÜbertragung
DH Diffi-Hellman
DHA Directory Harvest Attack
dHCI disaggregated Hyper Converged Infrastructure
DHCP Dynamic Host Configuration Protocol
DIL Dual In-Line
DIMM Dual In-line Memory Module
DIP Dual Inline Package
DiSEqC Digital Satellite Equipment Control
DIT Directory Information Tree
DIVO DIgitale OrtsVermittlungsstelle
DLL Dynamic Link Library
DLNA Digital Living Network Alliance
DLT Digital Linear Tape
DLT Distributed Link Tracking
DMA Direct Memory Access
DMB Digital Media Broadcast (Bosch/Blaupunkt)
DMI Desktop Management Interface
DMS Document Management System
DMZ DeMilitarized Zone
DNS Domain Name System
DOM Document Object Model
DoS Denial of Service
DOS Disk Operating System
DPI Data/Deep Packet Inspection
DPI Dots Per Inch
DRM Digital Rights Management
DS Directory Services
DSA Digital Signature Algorithm
DSL Digital Subscriber Line
DSL Domain Specific Language
DSLAM Digital Subscriber Line Anschluss-Modul
DSP Digital Signal Processing/Processor
DSSS Direct Sequence Spread Spectrum
DSTN Double Super Twisted Nematic
DTAG Deutsche Telekom AG
DTD Document Type Definition
DTMF DoppelTon-MehrFrequenz-Verfahren
DTS Digital Theatre System
DVB Digital Video Broadcasting
DVB-C Digital Video Broadcasting via Cable (ETS 300 429, EN 300 429)
DVB-CBMS Digital Video Broadcasting - Convergence of Broadcast and Mobile Services
DVB-CI Digital Video Broadcasting - Common Interface (EN 50221)
DVB-CS Digital Video Broadcasting ... (ETS 300 473, EN 300 473)
DVB-H Digital Video Broadcasting - Handheld
DVB-IPI Digital Video Broadcasting - Internet Protocol Infrastructure
DVB-MS Digital Video Broadcasting - Multipoint Subscription (ETS 300 748, EN 300 748)
DVB-NIP Digital Video Broadcasting - ... Interactive ... (ETS 300 802)
DVB-RCC Digital Video Broadcasting - ... interactive services ... (ETS 300 800)
DVB-RCT Digital Video Broadcasting - ... interactive services ... ISDN (ETS 300 801)
DVB-S Digital Video Broadcasting via Satellite (ETS 300 421, EN 300 421)
DVB-SI Digital Video Broadcasting - SetTopBox Interface (ETS 300 468, EN 300 468)
DVB-SIM Digital Video Broadcasting - SIMulcrypt (TS101 197-1)
DVB-SUB Digital Video Broadcasting - SUBtitles (ETS 300 743)
DVB-T Digital Video Broadcasting via Terrestrial (ETS 300 744, EN 300 744)
DVB-TXT Digital Video Broadcasting - TeleteXT (ETS 300 472, EN 300 472)
DVB-WIN Digital Video Broadcasting - Wireless In-home Networks
DVD Digital Versatile Disc (658 nm)
DVI Digital Visual Interface
DVI-A Digital Visual Interface - Analog
DVI-D Digital Visual Interface - Digital
DVI-I Digital Visual Interface - Integrated
e... Electronic ...
EAI Enterprise Application Integration
EAP Extensible Authentication Protocol (RFC 2284)
EAP-LEAP EAP Lightweight Extensible Authentication Protocol
EAP-SIM Subscriber Identity Module (GSM)
EAP-SRP EAP Secure Remote Password
EAP-TLS EAP Transport Layer Security
EAP-TTLS Tunneled Transport Layer Security
EAPoW EAP over Wireless
ECC Error Correction Code
ECMA European Computer Manufacturer's Association
EDID Extended Display Identification Data
EDO Extended Data Out
EDGE Enhanced Data rates for GSM Evolution
EEDID Enhanced Extended Display Identification Data
EEPROM Electrical Erasable Programmable Read Only Memory
EFI Extended/Extensible Firmware Interface
EGP Exterior Gateway Protocol
EIDE Enhanced Integrated Drive Electronics
EIRP Equivalent Isotropically Radiated Power
EISA Enhanced ISA
EKE Enhanced Key Exchange
EM Electro-Magnetic
EMH Emergency Medical Hologram
EMP EM-Pulse
EMV EM-Verträglichkeit
ENIAC Electronic Numerical Integrator And Computer
EOF End Of File
EOM End Of Message
EON Enhanced Other Networks
EOT End Of Tape
EOT End Of Text
EOT End Of Topic
EOT End Of Transmission
EPP Enhanced Parallel Port
ERD Entity Relationship Diagram
ESCD Extended System Configuration Data
ESD Electrostatic Discharge
ESDI Enhanced Small Device Interface
ESP EFI-Systempartition
ESP Encapsulated Security Payload (IP protocol #50)
ESSID Extended Service Set IDentifier
ETSI European Telecommunication Standards Institute
EULA End-User License Agreement
EVA Eingabe-Verarbeitung-Ausgabe
EVN EinzelVerbindungsNachweis
EWF Enhanced Write Filter
FAT File Allocation Table
FBDIMM Fully Buffered Dual In-line Memory Module
FC Fibre Channel
FC Flip Chip
FCoE Fibre Channel over Ethernet
FCC Federal Communications Commission
FCPGA Flip Chip Pin Grid Array
FDC Floppy Disk Controller
FDD Floppy Disk Drive
FDD Frequency Division Duplex
FDDI Fiber Distributed Data Interface
FDF Forms Data Format (see also: PDF)
FDM Frequency Division Multiplex
FDMA Frequency Division Multiple Access
FDX Full Duplex
FEC Forward Error Correction
FHS File Hierarchy Standard
FHSS Frequency Hopping Spread Spectrum
FIFO First In, First Out
FIPS Federal Information Processing Standard
FM Frequency Modulation
FPM Fast Page Module
FPU Floating Point Unit
FQDN Fully Qualified Domain Name
FRB Fault Resilient Booting
FRU Field Replaceable Unit
FS FileSystem
FSB Front Side Bus
FSF Free Software Foundation
FSK Frequency Shift Keying
FTA Free-to-Air
FTP File Transfer Protocol
FTZ FernmeldeTechnisches Zentralamt
FUBK Farb-UniversalBild mit Kreis ("TV-Testbild")
g... General/Generic/Global ... or GNU ...
GAP Generic Access Profile/Protocol
GAV Gateway Anti-Virus
GBIC GigaBit ethernet Interface Carrier
GDI Graphics Device Interface
GECOS General Electric Comprehensive Operating System
GEO Geostationary Orbit (ca. 36.000 km)
GID Group ID
GIF Graphic Interchange Format
GINA Graphical Identification and Authentication Module
GMS Global Management System
GMT Greenwich Mean Time
GNOME GNU Object Model Environment
GNU GNU is Not Unix
GPG GNU Privacy Guard
GPL GNU Public License
GPMC Group Policy Management Console
GPO Group Policy Objects
GPRS General Packet Radio Service
GPS Global Positioning System
GPT GUID Partition Table (up to 128 partitions per disk and volumes up to 18 exabytes)
GPU Graphics Processing Unit
GRE Generic Routing Encapsulation
GSM Global System for Mobile communication
GTC Generic Token Card
GTP GPRS Tunneling Protocol
GUI Graphical User Interface
GUID Global Unique ID
GVC Global VPN Client
HA High Availability
HAL HAL++ == IBM ?
HAL Hardware Abstraction Layer
HAM Hold And Modify
HBA Host Bus Adapter
HbbTV Hybrid Broadcast Broadband TV
HBCI Home-Banking Computer Interface (TCP:3000)
HC Home Computer
HCI Host Controller Interface
HCI Hyper Converged Infrastructure
HDCP High bandwidth Digital Content Protection
HDD Hard Disk Drive
HDLC High-level Data Link Control
HDMI High Definition Multimedia Interface
HDTV High Definition TeleVision (720p: 1280x720, 1080i: 1920x1080)
HE HöhenEinheit (bei 19"-Geräten - 44,45mm)
HID Human Interface Device
HiFi High Fidelity
HIPERLAN High Performance European Radio LAN
HIRD Hurd of Interfaces Representing Depth
HLR Home Location Register
HORM Hibernate Once, Resume Many
HPA Host-Protected Area
HPC Handheld-PC
HPC High-Performance Computing
HSCSD High-Speed Circuit Switched Data
HSDPA High-Speed Data/Downlink Packet Access
HSPA High-Speed Packet Access
HSUPA High-Speed Uplink Packet Access
HT HyperThreading
HTML HyperText Markup Language
HTTP HyperText Transfer Protocol
HURD Hird of Unix-Replacing Daemons
i... Intelligent ...
I2C Inter-Integrated Circuit bus
IaaS Infrastructure as a Service
IANA Internet Assigned Numbers Authority
IAS Internet Authentication Service
IBSS Independent Basic Service Set
IC Integrated Circuit
ICANN Internet Corporation for Assigned Names and Numbers
ICH I/O Controller Hub
ICMB Intelligent Chassis Management Bus
ICMP Internet Control Message Protocol
ICSA International Centre for Security Analysis ( &
ICSTIS Independent Committee for the Supervision of Standards of Telephone Information Services
ICQ "I seek you" - Internet-IM
ICU ISA Configuration Utility
ID IDentification
IDE Integrated Development Environment
IDE Integrated/Intelligent Device/Drive Electronics
IDEA International Data Encryption Algorithm
IDS Intrusion Detection System
IE Internet Explorer (Microsoft)
IEEE Institute of Electr(otechn)ical and Electronic{al|s} Engineers
IESG Internet Engineering Steering Group
IETF Internet Engineering Task Force:
I/F InterFace
IF Intermediate Frequency
IGMP Internet Group Management Protocol
IIC (I²C) Inter Integrated Circuit
IIS Identity Integration Server
IIS Internet Information Services/Server
IKE Internet Key Exchange (UDP port 500)
iLO Integrated Lights-Out
IM Inoffizieller Mitarbeiter (StaSi)
IM Instant Mess{a|e}(n)ger
IMAP Internet Message Access Protocol
IMEI International Mobile Equipment Identity
IMSI International Mobile Subscriber Identity
IMSP Internet Message Support Protocol
INT INTerrupt
I/O Input/Output
IP Internet Protocol
IPv4 Internet Protocol v4 (32 bit addresses)
IPv6 Internet Protocol v6 (128 bit addresses)
IPM Intelligent Platform Management
IPMB Intelligent Platform Management Bus
IPMI Intelligent Platform Management Interface
IPP Internet Printing Protocol
IPS Intrusion Prevention System
IPsec IP-security
IPTV TeleVision over Internet Protocol
IPX Internet Package eXchange (Novell NetWare)
IRC Internet Relay Chat
IrDA InfraRed Data Association
IRQ Interrupt ReQuest
ISA Industry Standard Architecture
ISA Internet Security and Acceleration (Microsoft)
ISAKMP Internet Security Association and Key Management Protocol
ISAM Index-Sequential Access Method
ISDN Integrated Services Digital Network
ISI Inter-Symbol Interference
ISIS Image and Scanner Interface Specification
ISM Industrial, Scientific and Medical band
ISP Internet Service Provider
iTAN indexed TAN
ITIL IT Infrastructure Library
ITsec IT-security
ITSM IT-Service-Management
ITU International Telecommunication Union
IV Initialisierungsvektor
IWV Impuls-Wahl-Verfahren
IXFR Incremental Zone Transfers
JBOD Just a Bunch Of Disks/Drives
JPEG Joint Photographic Experts Group
JRE Java Runtime Environment
K... KDE ... or Kernel ...
KDE K Desktop Environment
KISS Keep It Small & Simple / Keep It Simple, Stupid!
KK Konnektivitäts-Koordination (obsolete; nowadays use 'chprov' instead)
KVM Kernel-based Virtual Machine
KVM Keyboard/Video/Mouse
KVMR Keyboard/Video/Mouse Redirection
L... Local ... or Logical ...
L2TP Layer-2 Tunneling-Protocol
LAN Local Area Network
LBA Large/Logical Block Address(ing)
LBS Location Based Services
LCD Liquid Crystal Display
LCR Least Cost Routing
LD Laser Disc
LDAP Lightweight Directory Access Protocol ("X.500 lite")
LDIF Lightweight Data Interchange Format
LDM Logical Disk Manager
LEAP Ligthweight EAP (Cisco)
LED Light Emitting Diode
LEO Low Earth Orbit (500 - 1.000 km)
LFE Low-Frequency Effects
LGPL Ligthweight GPL
LLC Logical Link Control
LNB Low-Noise Block converter
LNC Low-Noise block Converter
LO LOop-back-interface
LOS Line of Sight
LPC Local Procedure Call
LSA Local Security Authority
LSA löt-, schraub- und abisolierfrei
LSB Linux Standard Base
LUN Logical Unit Number (SCSI)
LVD Low-Voltage Differential
LVM Logical Volume Manager
LWL LichtWellenLeiter
m... Mobile ...
MAC Macro Assembler (CP/M)
MAC Managed Address Configuration (IPv6)
MAC Mandatory Access Control
MAC Media Access Control(ler)
MAC Message Authentication Code
MAC Modified, Accessed, Changed
MAC Multiplexed Analogue Components
MAN Metropolitan Area Network
MAZ Magnetische AufZeichnung
MBR Master Boot Record (as partition scheme: up to 4 primary partitions as well as (chained) extended partitions; max size is 2TB)
MBSA Microsoft Baseline Security Analyzer
MCA MicroChannel Architecture
MCID Malicious Call IDentification
MCP Microsoft Certified Professional
MCSA Microsoft Certified System(s) Administrator
MCSE Microsoft Certified System(s) Engineer
MD Message Digest
MDA Mail Delivery Agent
MDA Mobile Digital Assistant
MDI Multi-Document Interface
MEO Medium Earth Orbit (5.000 - 12.000 km)
MFM Modified Frequency Modulation
MHS Message Handling System
MIB Management Information Base
MIDI Music Instrument Digital Interface
MIME Multipurpose Internet Mail Extension
MIMO Multiple Input, Multiple Output
MIT Massachusetts Institute of Technology
MitM Man-in-the-Middle (between Alice & Bob)
MMC Microsoft Management Console
MMS Multimedia Messaging Service
MMU Memory Management Unit
MMX MultiMedia eXtension
MoCo Mobile Communications
MoDem Modulator/Demodulator
MOM Microsoft Operations Manager
MPC Multimedia-PC-Specification (seems obsolete ... :)
MPEG Motion/Moving Picture(s) Expert Group
MPLS Multiprotocol Label Switching
MRU Most Recently Used
MS Microsoft
MSCDEX Microsoft CD Extension
MSDE Microsoft SQL Server Desktop Edition
MSDN Microsoft Developer Network
MSDNAA Microsoft Developer Network Academic Alliance
MSKB Microsoft Knowledge Base
MSM Microsoft Systems Manager
MSM MegaRAID Storage Manager (LSI/Avago/Broadcom)
MSN Microsoft Network (obsolete)
MSN Multiple Subscriber Numbers
MSR Messen, Steuern, Regeln
MSS Managed Security Services
MSS Maximum Segment Size
MSSP Managed Security Services Provider
MTA Mail Transfer Agent
MTBF Mean Time Between Failure
MTU Maximum Transmission/Transfer Unit
MUA Mail User Agent
MUX Multiplexer
MVC Model-View-Controller
MX Mail eXchange(r)
NACK Negative/Not Acknowledgement/~d
NAPT Network Address Port Translation
NAS Network Access Server
NAS Network Attached Storage
NAT Network Address Translation
NCQ Native Command Queuing (S-ATA)
NCSI Network Connectivity Status Indicator
NCSI Network Controller Sideband Interface
NDIS Network Device Interface Specification
NDS Novell Directory Services
NES Nintendo Entertainment System
NETBEUI NetBIOS/Network Basic Extended User Interface
NetBIOS Network Basic Input Output System
NFS Network File System
NIC Network Information Center
NIC Network Interface Card
NIL Not In List
NIS Network Information System
NLA Next-Level Aggregation
NLM Netware Loadable Module
NMI Non-Maskable Interrupt
NNTP Network News Transfer Protocol
NNW Novell NetWare
NOC Network Operations Center
NOP No OPeration
NORAD North American Aerospace Defense Command
NT Network Termination/Terminator
NT New/Next Technology (Microsoft Windows)
NTBA Network Termination (for ISDN) Basic (rate) Access
NTDS NT Directory Services
NTF No Trouble Found
NTFS New/Next Technolgy FileSystem
NTP Network Time Protocol
NTSC National Television Standards/System Committee (720[853]x480[525])
NTT Nippon Telephone and Telegraph
NUL Null
NULL nada :)
NUMA Nun-Uniform Memory Architecture
O... Open ...
OASIS Organization for the Advancement of Structured Information Standards
OBEX Object Exchange Protocol
OC OverClocking (jargon)
ODBC Open DataBase Connectivity
OE Outlook Express (Microsoft)
OFDM Orthogonal Frequency Division Multiplex
OH Off Hook
OID Object ID
OMG Open Management Group
OOA Object-Oriented Analysis
OOBE Out-Of-Box Experience
OOP Object-Oriented Paradigma / Programming
OPAL Optische Anschluss-Leitung (OPtical Access Line)
OPGA Organic Pin Grid Array
ORB Object Request Broker
OS Open Source
OS Operating System
OSD On-Screen Display
OSDN Open Source Development Network: Entwickler- und Entwicklungsnetzwerk der openSource-Gemeinde
OSF Open Software Foundation
OSI Open Systems Interconnection
OSPF Open Shortest Path First
OSS Open Sound System
OSS OpenSource Software
OSS Operation SubSystem
OTDR Optical Time Domain Reflector
OTP One-Time Password (see also RFC 1938)
OVM OrtsVerMittlung
OWA Outlook Web Access
P-ATA Parallel ATA (also often referenced as IDE)
P2P Peer to Peer
PAL Phase Alternating Line (720[768]x576[625], PAL plus: 1024x576))
PAM Pluggable Authentication Module
PAN Personal Area Network
PAP Password Authentication Protocol
PBR Policy-Based Rule
PBX Primary Branch Exchange
PC Personal Computer
PCB PolyChlorierte Biphenyle ("Leiterplatten"/Platinen)
PCF Point Coordination Function
PCI Peripheral Components Interconnect
PCI Protocol Control Information
PCIe Peripheral Components Interconnect express
PCL Page Code Language
PCM Pulse Code Modulation
PCMCIA Personal Computer Memory Card International Association
PCT PolyChlorierte Terphenyle ("Leiterplatten"/Platinen)
PDA Private Digital Assistant
PDC Primary Domain Controller
PDF Portable Document Format (Adobe Acrobat)
PDH Plesiochronous Digital Hierarchy
PDN Public Data Network
PDNS Passive DNS
PDU Power Distribution Unit
PDU Protocol Data Unit
PE Preinstallation Environment
PEAP Protected EAP
PECI Platform Environment Control Interface
PEG PCI-Express-Graphics
PERL Pathologically Eclectic Rubbish Lister *g* (Larry Wall's Practical Extraction and Report Language)
PFC Power Fan Control (power supply unit)
PFC Power-Factor Correction (power supply unit, reactive power compensation / "Blindleistungskompensation")
PFC Pre-Flight Check (in IT: QA before commissioning / going live)
PFC Priority Flow Control
PGA Pin Grid Array
PGP Pretty Good Privacy
PHP PHP Hyptertext Preprocessor / legacy: Private HomePage (Tools)
PHY PHYsical Layer
PID Process ID
PIM Personal Information Manager
PiMF Paarig In MetallFolie
PIN Personal Identification Number
PK Public Key
PKCS Public Key Cryptography Standards
PKI Public Key Infrastructure
PKS Public Key Server/Service/System
PLL Phase Lock(ed) Loop
PLMN Public Land Mobile Network
PM Phase Modulation
PMPO Peak Music Power Out
PMR Personal Mobile Radio
PMX Primär-MultipleX-Anschluss
POC Proof Of Concept
PoP Point of Presence
POP Post Office Protocol
POS Power On Sleep (ACPI S1)
POSIX Portable Operating System Interface for Computing Environments (POSIX.1 == IEEE 1003.1-1990)
POST Power-On Self Test
POTS Plain Old Telephone System
PPC PocketPC
PPP Point-to-Point Protocol
PPPoE PPP over Ethernet (z.B. T-DSL)
PPTP Point-to-Point Tunneling Protocol
PRI Primary Rate Interface
PRN Pseudo-Random Noise
PRNG Pseudo-Random Number Generator
PROM Programmable Read-Only Memory
PS PostScript
PSK Phase-Shift Keying
PSK Pre-Shared Key
PSTN Public Switched Telephone Network
PTR Pointer
PUK Personal Unblocking Key
PVC Permanent Virtual Circuit
PVN Property Version Number
PXE Preboot eXecution Environment
QoS Quality of Service
QPSK Quadrature Phase Shift Keying
r... Remote ...
RADAR RAdio Detecting / Detection And Ranging
RADIUS Remote Authentication Dial-In User Service (RFC 2865)
RAID Redundant Array of Independant/Inexpensive Disks
RAM Random Access Memory
RAMDAC Random Access Memory Digital Analog Converter
RARP Reverse ARP
RAS Remote Access Service
RCA Radio Corporation of America
RDBS Relational DataBase System
RDC Remote Desktop Connection
RDP Remote Desktop Protocol
RDRAM Rambus Dynamic RAM
RDS Radio Data System
RegExp Regular Expression (POSIX 1003.2)
RegTP Regulierungsbehörde für Telekommunikation und Post
RF Radio Frequency
RFC Request for comments: - Diskussionsgrundlage der IETF, offen für Vorschläge und Diskussionen; diese Papiere stellen keine Standards im eigentlichen Sinne, sondern nur Quasi-Standards dar; dienen jedoch durch ihre offene Struktur einem Großteil der Hard- und Software, die das Internet ausmacht, als Grundlage.
RFID Radio Frequency ID
RGB Red/Green/Blue
RHEL RedHat Enterprise Linux
RID Relative ID
RIMM Rambus In-line Memory Module
RIP Rest In Peace
RIP Routing Information Protocol
RIPE Réseaux IP Européens
RIS Remote Installation Service
RISC Reduced Instruction Set Code/Computing
RLL Run-Length Limited
RMA Radio Manufacturers Association
RMCP Remote Mail Checking Protocol
RMI Remote Method Invocation
RO Read-Only
ROM Read-Only Memory
RPC Remote Procedure Call
RPL Remote Program Load
RPM Redhat Package Manager
RR Resource Record
RSA Rivest, Shamir, Adleman
RSS Really Simple Syndication
RSTP Rapid Spanning Tree Protocol (IEEE 802.1w)
RTC Real Time Clock
RTFM Read The Fine :) Manual
RTP Realtime Transport Protocol
RTS Ready To Send
RTT Round Trip Time
RX Receive
RZ RechenZentrum
SaaS Software-as-a-Service
S-ATA Serial ATA
SAM Security Accounts Manager
SAN Storage Array Network
SANE Scanner Access Now Easy
SAS Serial Attached SCSI
SB SoundBlaster
SBC Server Based Computing
SC SmartCard
SCA Single Connector Attachment
SCM Software Configuration Management
SCP Secure CoPy
SCR Sat-Channel-Router (EN 50494, Unicable)
SCSI Small Computer System Interface
SCTP Stream Control Transmission Protocol
SD Secure Digital
SD Software Defined ...
SDDC Software Defined Data Center
SDN Software Defined Network(ing)
SDH Synchronous Digital Hierarchy
SDI Single-Document Interface
SDK Software Development Kit
SDMA Space Division Multiple Access
SDP Service Discovery Protocol
SDR Sensor Data Record
SDR Software Defined Radio
SDRAM Synchronous Data/Dynamic RAM
SDS Software Defined Storage
SDSL Symmetric Digital Subscriber Line
SDU Service Data Unit
SE Single Ended
SECAM Sequence Couleur a Memoire
SES SCSI Enclosure Services
SETI Search for ExtraTerrestrial Intelligence
SFT System Fault Tolerance
SFTP SSH File Transfer Protocol
SGML Standardized General Markup Language
SGMS SonicWall Global Management System
SGRAM Synchronous Graphic RAM
SHA Secure Hash Algorithm
SID Security ID
SID Sound Interface Device (C64)
SIM Subscriber Identity Module
SIMM Single In-line Memory Module
SIP Session Initiation Protocol
SKEME versatile Secure Key Exchange MEchanism for internet
SLA Service Level Agreement
SLA Site-Level Aggregation
SLES Suse Linux Enterprise Server
SLI Scalable Link Interface
SLIP Serial Line IP
SMART Self-Monitoring And Reporting Tool
SMASH System Management Architecture for Server Hardware
SMB Server Message Block
SMI Structure of Management Information
SMI System Management Instrumentation
SMI System Message Interception
SMS Short Message Service
SMTP Simple Mail Transfer Protocol
SMbus System Management Bus
SMI System Management Interrupt
SMP Symmetric Multi-Processing
SNES Super-Nintendo Entertainment System (or Suse-Novell Enterprise-Server? :)
SNMP Simple Network Management Protocol
SNTP Simple Network Time Protocol
SOA Service-Oriented Architecture
SOAP Simple Object Access Protocol
SoC System on Chip
SoL Serial over LAN
SONAR SOund Navigation And Ranging
SONET Synchronous Optical Network
SP ServicePack: kumulative Sammlung von Microsoft-(Sicherheits-)updates
SPD Serial Presence Detect
SPDIF Sony-Panasonic Digital InterFace
SPEKE Simple Password authenticated Exponential Key Exchange
SPI SCSI Parallel Interface
SPI Security Parameters Index (IPsec)
SPI Security Protocol Identifier (IPsec)
SPOF Single Point Of Failure
SPX Secure Package eXchange (Novell NetWare)
SQL Structured Query Language
SRAM Static Random Access Memory
SSD Solid State Disk
SSH Secure SHell
SSID Service Set IDentifier
SSL Secure Socket Layer
STD Suspend To Disk (ACPI S4)
STONITH Shoot The Other Node In The Head
STP Spanning Tree Protocol (IEEE 802.1d)
STR Suspend To RAM (ACPI S3)
STUN Simple Traversal of UDP trough NAT
SUS Software Update Service
SVC Switched Virtual Circuit
SVGA Super Video Graphic Adapter
SYN SYNchronize
T-DSL Telekom DSL (germany)
TAE Telefon-Anschluss-Einheit
TAN TransAction Number
TAPI Telephone API
TC Trust-Center
TC Trusted Computing
TCG Trusted Computing Group
TCP Transmission Control Protocol
TCPA Trusted Computing Platform Alliance
TDM Time Division Multiplex
TDMA Time Division Multiple Access
TE Terminal Equipment
TEMPEST Telecommunications Electronics Material Protected from Emanating Spurious Transmissions
TEMPEST Transient ElectroMagnetic Pulse Emanation STandard (against van-Eck)
TFT Thin Film Transistor
TFTP Trivial FTP
TIM Traffic Indication Map
TK Telekommunikation
TKIP Temporal Key Integrity Protocol
TLA Top-Level Aggregation
TLB Translation Lookaside Buffer
TLD Top-Level Domain
TLS Terminal License Server
TLS Transmission Layer Security
TM Turing Machine
TMC Traffic Message Channel (in D seit 1997,
TMDS Transition-Minimized Differential Signaling
TMSI Temporary Mobile Subscriber Identity
TOC Table Of Contents
TOS Tramiel's Operating System
TOS Type Of Service
TP Test Point
TP Transport Protocol
TP Turbo Pascal
TPC Transmit Power Control
TPM Trusted Platform Module
TSAC Terminal Services Advanced Client
TSIG Transaction SIGnature
TSR Technical Support Report
TSR Terminate and Stay Resident
TTF True-Type Font
TTL Time to live
TTL Transistor-Transistor-Logic
TV TeleVisor/TeleVision
TWAIN Technology Without An(y) Interesting Name (no, not really ...)
TX Transmit
U... Unified ... or Universal ...
UART Universal Asynchronous Receiver and Transmitter
UBR Unspecified Bit Rate
UDDI Universal Description, Discovery and Integration
UDI Unified Display Interface
UDP User Datagram Protocol
UEFI Unified EFI
UHF Ultra-High Frequency
UI User Interface
UKW Ultra-KurzWelle
ULA User-Level Authentication
UMD Universal Media Disc (Sony, z.B. PSP)
UML Unified Modelling Language
UMTS Universal Mobile Telecommunications System: digitaler Standard für Mobiltelefonie
UNII Unlicensed National Information Infrastructure
UPnP Universal Plug and Play
UPS Uninterruptable Power Source (see also: USV)
URI Universal Resource Identifiers
URL Uniform Resource Locator
USB Universal Serial Bus
USN Update Sequence Number (MS-AD, NTFS v5.0)
USV Unterbrechungsfreie StromVersorgung (see also: UPS)
UTC Universal Time Coordinated
UTM Unified Thread Management
v... virtual ...
VB Visual Basic
VBA Visual Basic for Applications
VBR Variable Bit Rate
VC Virtual Circuit
VC VolksComputer (Commodore VIC 20)
VCI Virtual Circuit Identifier (bei T-DSL: VCI=32)
VDM Virtual DOS Machine
VDSL Very high speed Digital Subscriber Line
VESA Video Electronic Standard Association
VGA Video Graphic Adapter
VHDL Very High Description Language
VHF Very High Frequency
VLAN Virtual LAN
VLR Visitor Location Register
VLSI Very Large Scale Integrated
VM Virtual Machine
VM Virtual Memory
VoIP Voice-over-IP
VPI Virtual Path Identifier (bei T-DSL: VPI=1)
VPN Virtual Private Network
VR Virtual Reality
VRML Virtual Reality Modelling Language
VT VideoText
VT Virtual Terminal
VTL Virtual Tape Library
w... Wireless ...
W3C World Wide Web Consortium
WAN Wide Area Network
WAP Wireless Application Protocol
WDDX Web Distributed Data eXchange
WDM Windows Driver Model
WDMA Wavelength Division Multiplex
WebDAV WWW/Web-based Distributed Authoring and Versioning
WECA Wireless Ethernet Compatibility Alliance
WEP Wired Equivalent Privacy (WEP64: 40 Bit, WEP128: 104 Bit)
WGA Windows Genuine Advantage
WGS Wireless Guest Service
WIA Windows Image Acquisition
WiFi Wireless Fidelity
Wimax Worldwide Interoperability for Microwave Access
Win Windows
WINS Windows Internet Naming Service
WLAN Wireless Local Area Network: drahtloses Netzwerk mit beschränkter Reichweite (z.B. Campus)
WLL Wireless Local Loop
WMI Windows Management Instrumentation
WML Wireless Markup Language
WoL Wake-On-LAN
WORM Write Once, Read Many
WoW Windows-on-Windows (e.g. Win16 on Win32, Win32 on Win64)
WPA WiFi Protected Access
WPAN Wireless PAN
WPF Windows Presentation Foundation
WPF/E Windows Presentation Foundation Everywhere
WSN Wireless Sensor Network
WSN Web Services Notifications
WSRF Web Services Resource Framework
WTS Windows Terminal Services
WUS Windows Update Service
WYSIWYG What You See Is What You Get
WWW World Wide Web
X... eXtended/eXtensible...
XDR eXternal Data Representation
XML eXtensible Markup Language
XPe Microsoft Windows XP embedded
XT eXtended Technology
YAFFS Yet another Flash File System
YaST Yet another Setup Tool
YP Yellow Pages (NIS)
ZBR Zone Bit Recording
ZIF Zero Insertion Force
ZOPE Z Object Publishing Environment
total number: 1100

Thx to Sebastian 'smessing' Messing for his assistance in completing this list!

no responsibility is taken for the correctness of this information ... typo's included :)