| µs | Microsecond |
| A | |
| AAP | Application Area Profile |
| ABIT | Airborne Information Transfer |
| AEP | Automatic ELINT Processor |
| AEP | Application Environment Profile |
| AFCEA | Armed Forces Communications and Electronic Association |
| AGC | Automatic Gain Control |
| AGL | Above Ground Level |
| AIP | Airborne Imagery Processor |
| AIS | Automated Information System |
| AITS | Adopted Information Technology Standards |
| ALS | Airborne Link Segment (CARS) |
| AM | Amplitude Modulation |
| ANSI | American National Standards Institute |
| ANT | Antenna |
| AOA | Angle of Arrival |
| AOITF | Airborne Overhead Interoperability Task Force |
| API | Application Program Interface |
| APP | Application Portability Profile |
| APS | ASARS Processing Segment (CARS) |
| APSK | Amplitude Phase Shift Keying |
| ARDPCM | Adaptive Recursive Differential Pulse Code Modulation |
| ARITA | Airborne Reconnaissance Information Technical Architecture (DARO) |
| ARL | Airborne Reconnaissance Low |
| ARTPP | Airborne Reconnaissance Technology Program Plan |
| ASARS | Advanced Synthetic Aperture Radar System |
| ATARS | Advanced Tactical Air Reconnaissance System |
| ATD | Advanced Technology Demonstration |
| ATDL | Army Tactical Data Link |
| ATM | Asynchronous Transfer Mode |
| ATR | 1. Automatic Target Recognition 2. Air Transport Requirements |
| B | |
| BER | Bit Error Rate |
| BGPHES | Battle Group Passive Horizon Extension System |
| BIT | Built in Test |
| BLOS | Beyond Line-of-Sight |
| BNC | British Naval Connector |
| bps | Bits per second |
| Bps | Bytes per Second |
| BUD | Back-Up Dissemination |
| C | |
| C2 | Command And Control |
| C2DW | Command and Control Descriptor Words |
| C2I | Command, Control and Information |
| C3I | Command, Control, Communications, and Intelligence |
| C4I | Command, Control, Communications, Computers, and Intelligence |
| C4IFTW | Command, Control, Communications, Computers, and Intelligence for the Warrior |
| C4ISR | Command, Control, Communications, Computers, and Intelligence, Surveillance and Reconnaissance |
| CALS | Continuous Acquisition and Lifecycle Support |
| CARS | Contingency Airborne Reconnaissance System |
| CASE | Computer-Aided Software Engineering |
| CATIS | Computer-Aided Tactical Information System |
| CCIR | Co-channel Interference Reduction |
| CCITT | Consultative Committee for International Telephony and Telegraph (now ITU) |
| CCR | Commitment, Concurrency and Recovery |
| CDL | Common Data Link |
| CD-ROM | Compact Disc |
| CDSA | Common Data Security Architecture |
| CEP | Circular Error Probable |
| CFA | Center for Architecture |
| CFS | 1. Cryptographic File System 2. Center for Standards |
| CGI | Computer Graphics Interface |
| CGM | Computer Graphics Metafile |
| CHBDL | Common High Bandwidth Data Link |
| CI | Commercial Items |
| CIGSS | Common Imagery Ground/Surface System |
| CII | Cryptologic Information Infrastructure |
| CINC | Commander-in-Chief |
| CIRC | Circular |
| CITIS | Contractor Integrated Technical Information Service |
| CJCS | Chairman of the Joint Chiefs of Staff |
| CJCSI | CJCS Instruction |
| CL | Certificate Library |
| CLI | Certificate Library Interface |
| CLNP | Connectionless Network Protocol |
| CMIS | Common Management Information Service |
| CNR | Carrier to Noise Ratio |
| COE | Common Operating Environment |
| COMINT | Communications Intelligence |
| COMSEC | Communications Security |
| CORBA | Common Object Request Broker Architecture |
| COS | Communications Segment (CARS) |
| COSE | Common Open System Environment |
| COTS | Commercial Off-The-Shelf |
| CPEG | Cross Program Elint Geolocation |
| CROFA | Consolidated Remote Operations Facility Airborne (Replaces ROFA) |
| CryptoAPI/CAPI | Cryptologic Application Program Interfaces |
| Cs | Cesium (Atomic Clock Reference) |
| CSA | Cryptologic System Architecture |
| CSARP | Common SAR Processor |
| CSDF | Collected Signal Data Format |
| CSMA/CD | Carrier Sense Multiple Access/Collision Detect |
| CSP | Cryptographic Service Providers |
| CSSM | Common Security Services Manager |
| CTE | Compound Text Encoding |
| CW | Continuous Wave |
| CWDW | Continuous Wave Descriptor Words |
| D | |
| DARO | Defense Airborne Reconnaissance Office |
| DARP | Defense Airborne Reconnaissance Program |
| DARPA | Defense Advanced Research Projects Agency |
| DARSC | Defense Airborne Reconnaissance Steering Committee |
| dB | Decibel |
| DBMS | Database Management System |
| DBS | Direct Broadcast Service |
| DCE | 1. Data Circuit-Terminating Equipment 2. Distributed Computing Environment |
| DCGS | Distributed Common Ground Station |
| DCI | 1. Data Control Indicator 2. Director of Central Intelligence |
| DCRSI | Digital Cassette Recording System Improved |
| DCT | Discrete Cosine Transform |
| DD | Differential Doppler |
| DDS | Defense Dissemination System |
| DERG | Data Extraction and Reduction Guide |
| DES | Data Encryption Standard |
| DF | Direction Finding |
| DFS | Distributed File System |
| DGIF | Deployable Ground Intercept Facility (CARS) |
| DGPS | Differential Global Positioning Service |
| DIA | Defense Intelligence Agency |
| DIGEST | Digital Geographic Information Exchange Standard |
| DII | Defense Information Infrastructure |
| DII-COE | Defense Information Infrastructure Common Operating Environment |
| DIS | Draft International Standard |
| DISA | Defense Information Systems Agency |
| DISN | Defense Information System Network |
| DISP | Draft International Standardized Profile |
| DL | Data Library |
| DLI | Data Library Interface |
| DMA | Defense Mapping Agency (Now part of NIMA) |
| DME | Distributed Management Environment |
| DMI | Definition of Management Information |
| DOA | Direction of Arrival |
| DoD | Department of Defense |
| DoDD | DoD Directive |
| DoDI | DoD Instruction |
| DoDIIS | Department of Defense Intelligence Information System |
| DPA | Document Printing Application |
| DPCM | Differential Pulse Coded Modulation |
| DSCS | Defense Satellite Communication System |
| DSP | Digital Signal Processing |
| DSS | Digital Signature Standard |
| DTE | Data Terminal Equipment |
| DTED | Digital Terrain Elevation Data |
| DW | Descriptor Word |
| E | |
| ECMA | European Computer Manufacturers' Association |
| EDI | Electronic Data Interchange |
| EEI | 1. Essential Elements of Information 2. External Environment Interfaces |
| EEP | Elliptic Error Probable |
| EES | Escrow Encryption Standard |
| ELINT | Electronic Intelligence |
| EMC | Electromagnetic Compatibility |
| EMI | Electromagnetic Interference |
| EO | Electro-Optical |
| ETDU | Estimated Time Delay Uncertainty |
| ETP | Extended Tether Program |
| ETRAC | Enhanced Tactical RADAR Correlator |
| F | |
| FCC | Federal Communications Commission |
| FC-PH | Fibre Channel Physical and Signaling Interface |
| FDDI | Fiber Distributed Data Interface |
| FDOA | Frequency Difference of Arrival |
| FEC | Forward Error Correction |
| FEC-I | Forward Error Correction (effectivity 1) |
| FEC-II | Forward Error Correction (effectivity 2) |
| FFT | Fast Fourier Transform |
| FIMS | Forms Interface Management Standard |
| FIPS | Federal Information Processing Standard |
| FISINT | Foreign Instrumentation Signals Intelligence |
| FM | Frequency Modulation |
| FOM | Figure Of Merit |
| FPGA | Field Programmable Gate Array |
| FRM | Functional Reference Model |
| FSD | Fixed Shroud Duplex |
| FSKMOP | Frequency Shift Keying Modulation on Pulse |
| FTAM | File Transfer Access and Manipulation |
| FTP | File Transfer Protocol |
| G | |
| GB | Gigabyte, 1,000 Megabytes (10 to the 9th power) |
| Gbps | Gigabit per second |
| GCCS | Global Command and Control System |
| GCP | Ground Control Processor (CARS) |
| GCS | Global Connectivity Service |
| GCSS | Global Command Support System |
| GDMO | Guidelines for the Definition of Managed Objects |
| GFI | Government Furnished Information |
| GIS | Geographical Information System |
| GKS | Graphical Kernel System |
| GKS-3D | GKS for 3 Dimensions |
| GMI | Generic Management Information |
| GMT | Greenwich Mean Time (See UTC) |
| GNMP | Government Network Management Profile |
| GOSIP | Government Open Systems Interconnection Profile |
| GOTS | Government off-the-Shelf |
| GPS | Global Positioning System |
| GUI | Graphical User Interface |
| GULS | Generic Upper Layer Security |
| H | |
| HAE | High Altitude Endurance (UAV) |
| HBP | High Band Prototype |
| HBSS | High Band SubSystem (JSAF) |
| HCI | Human-Computer Interface |
| Hdbk | Handbook |
| HDBS | Host Database System |
| HDLC | High-level Datalink Control |
| HDTV | High Definition Television |
| HF | High Frequency (3-30 MHz) |
| Hi8 | Hi-band 8mm magnetic tape format |
| HiPPI | High Performance Parallel Interface |
| HiPPI-FP | HiPPI Framing Protocol |
| HiPPI-PH | HiPPI Physical Layer |
| HMI | Human Machine Interface |
| HMMWV | High Mobility Multi-purpose Wheeled Vehicle |
| HOL | High Order Language |
| HSI | Hyper-Spectral Imagery |
| Hz | Hertz |
| I | |
| IADL | Interoperable Airborne Data Link |
| IADL2 | Interoperable Airborne Data Link 2 (Supports AIP) |
| IAW | In Accordance With |
| ICCCM | Inter Client Communication Conventions Manual |
| ICD | Interface Control Document |
| ICM | Interoperability, Connectivity, Modernization |
| ICMP | Internet Control Message Protocol |
| ICS Interface Control Specifications | IDE Integrated Device (or Drive) Electronics |
| IDL | Interoperable Data Link |
| IEC | International Electrotechnical Commission |
| IEEE | Institute of Electrical and Electronic Engineers |
| IEP | Interactive ELINT Processor |
| IES | Imagery Exploitation Segment (CARS) |
| IETM | Interactive Electronic Technical Manual |
| IF | Intermediate Frequency |
| IFT | Inverse Fourier Transform |
| IGES | Initial Graphics Exchange System |
| IJMS | Interim JTIDS Message Specification |
| IM | Information Management |
| IMINT | Imagery Intelligence |
| INFOSEC | Information Security |
| INS | Inertial Navigation System |
| IOP | Interface Operating Procedures |
| IOSA | Integrated Overhead SIGINT Architecture |
| IP | Internet Protocol |
| IPF | Integrated Processing Facility |
| IPT | Integrated Product Team |
| IR | Infrared |
| IRDS | Information Resources Directory System |
| IRIG | Inter Range Instrumentation Group |
| I&RTS | Integration and Runtime Specification (DII COE) |
| ISB | Intelligence Systems Board |
| ISDN | Integrated Services Digital Network |
| ISO | International Standards Organization |
| ISP | International Standardized Profile |
| ISRS | Intelligence, Surveillance, and Reconnaissance Systems |
| IT | Information Technology |
| ITSA | Integrated Tactical SIGINT Architecture |
| ITSG | Information Technology Standards Guidance |
| ITU | International Telecommunications Union |
| IWSDB | Integrated Weapon System Database |
| J | |
| JAC | Joint Analysis Center (Molesworth, UK) |
| JASA | Joint Airborne SIGINT Architecture |
| JASPO | Joint Airborne SIGINT Program Office |
| JASS | Joint Airborne SIGINT System (see JSAF) |
| JBS | Joint Broadcast Service |
| JCMT | Joint Collection Management Tool |
| JCS | Joint Chiefs of Staff |
| JDISS | Joint Deployable Intelligence Support System |
| JIC | Joint Intelligence Center |
| JIEO | Joint Interoperability and Engineering Office |
| JION | Joint Interoperable Operator Node |
| JIPS | JASA Interface Points |
| JIWG | Joint Interplatform Working Group |
| JPEG | Joint Photographic Experts Group |
| JSAF | Joint SIGINT Avionics Family (new name for JASS) |
| JSH | JASA Standards Handbook |
| JSWG | JASA Standards Working Group |
| JTA | Joint Technical Architecture |
| JTF | Joint Task Force |
| JTIDS | Joint Tactical Information Distribution System |
| JTRM | JASA Technical Reference Model |
| JWICS | Joint Worldwide Intelligence Communications System |
| K | |
| k | Kilo (1000) |
| kB | Kilobyte |
| kbps | Kilobit per second |
| KMP | Key Management Protocol |
| L | |
| LAN | Local Area Network |
| LBSS | Low Band SubSystem (part of JSAF) |
| LCM | Low Cost Media |
| LO HAE | Low Observable High Altitude Endurance (UAV) |
| LOB | Line of Bearing |
| LOS | Line-of-Sight |
| LSB | Lower Side Band |
| M | |
| M2K | Midas 2K |
| MAC | Medium Access Control |
| MAE | Medium Altitude Endurance (UAV) |
| MASINT | Measurement and Signature Intelligence |
| Mb | Mega bit |
| MB | Mega Byte |
| Mbps | Megabits per second |
| MCC | Main Computer Center |
| MCEB | Military Communications-Electronics Board |
| METT-T | Mission, Enemy, Troops, Terrain and Time |
| MFLOPs | Million Floating Point Operations per second |
| MHS | Message Handling System |
| MHz | Mega Hertz |
| MIDS | Multifunctional Information Distribution System |
| MIL-HDBK | Military Handbook |
| MIL-STD | Military Standard |
| MIPS | Millions of Instructions per second |
| MIS | 1. Management Information System 2. Mission Intelligence Segment (CARS) |
| MIST | Modulator Interoperable Surface Terminal (CDL) |
| MLG | Multilevel Guard |
| MLS | Multi-Level Security |
| MNS | Mission Needs Statement |
| MOBSTR | Mobile Stretch |
| MPEG | 1. Motion Picture Experts Group 2. Multiple Platform Emitter Geolocation |
| MSI | Multi-Spectral Imagery |
| MSL | Mean Sea Level |
| MSP | Message Security Protocol |
| MSPS | Mega Samples per second |
| N | |
| NavDW | Navigation Descriptor Words |
| NCSC | National Computer Security Center |
| NETBLT | Network Block Transfer |
| NFS | Network File System |
| NIC | National Intelligence Community |
| NIMA | National Imagery and Mapping Agency |
| NIS | 1. National Input Segment 2. Network Information Service |
| NIST | 1. National Intelligence Support Team 2. National Institute of Standards and Technology |
| NLSP | Network Layer Security Protocol |
| NMF | Network Management Forum |
| NMJIC | National Military Joint Intelligence Center |
| NPIC | National Photographic Interpretation Center |
| NRO | National Reconnaissance Office |
| ns | Nanosecond |
| N-TIS | Navy Tactical Input Segment |
| O | |
| OC-n | Optical Channel n (e.g., OC-3, OC-4) |
| ODA | Office Document Architecture |
| ODBC | Open Database Connectivity |
| ODT | Optical Digital Technologies |
| OMG | Object Management Group |
| OO | Object Oriented |
| OOA | Object Oriented Analysis |
| OODBMS | Object Oriented DBMS |
| OOP | Object Oriented Programming |
| OOT | Object Oriented Technology |
| OP | Operational |
| ORB | Object Request Brokers |
| ORD | 1. Operational Requirements Document 2. Office of Research and Development |
| OSD | Office of Secretary of Defense |
| OSE | Open Systems Environment |
| OSE/IA | OSE Profile for Imminent Acquisitions |
| OSF | Open Software Foundation |
| OSI | Open Systems Interconnect |
| OT&E | Operational Test and Evaluation |
| P | |
| P3I | Preplanned Product Improvement |
| PAR | Parameterizer |
| PCM | Pulse Code Modulation |
| PCTE | Portable Common Tools Environment |
| PDU | Protocol Data Units |
| PDW | Pulse Descriptor Word |
| PEX | PHIGS Extensions to X |
| PGP | Pretty Good Privacy |
| PHIGS | Programmer's Hierarchical Interactive Graphics System |
| PIM | Platform Interface Module |
| PM | Phase Modulation |
| PMD | Physical Medium Dependent |
| PMO | Program Management Office |
| POSIX | Portable Operating System Interface |
| Post-D | Post Detected |
| PPS | 1. Pulses Per Second 2. Precise Positioning Service (GPS) |
| Pre-D | Pre Detected |
| PSK | Phase Shift Keying |
| PSKMOP | Phase Shift Keying Modulation on Pulse |
| PTTI | Precise Time and Time Interval |
| PUB | Publication |
| Q | |
| QAM | Quadrature Amplitude Modulation |
| QPSK | 1. Quarternary Phase Shift Keying 2. Quadrature Phase Shift Keying |
| QRC | Quick Reaction Capability |
| q.v. | Which see |
| R | |
| RAID | Redundant Arrays of Inexpensive Disks |
| RAM | Random Access Memory |
| Rb | Rubidium (Atomic Clock References) |
| RDA | Remote Data Access |
| RDBMS | Relational DBMS |
| RF | Radio Frequency |
| RFC | Request for Comment (Internet) |
| RFD | RF Signal Distribution |
| RFP | Request for Proposal |
| RISC | Reduced Instruction Set Computers |
| RMS | 1. Requirements Management System 2. Root Mean Square |
| ROFA | Regional Operations Facility, Airborne |
| ROM | Read Only Memory |
| RPC | 1. Rapid Positioning Capability 2. Remote Procedure Call |
| RSOC | Remote SIGINT Operations Center |
| RSS | Root of the Sum of the Squares |
| RTCA | Radio Technical Commission for Aeronautics |
| Rx | Receiver |
| S | |
| SAG | SQL Access Group |
| SAMeDL | SQL/Ada Module Description Language |
| SAMP | 1. Security Association Management Protocol 2. Single Acquisition Master Plan |
| SAR | Synthetic Aperture Radar |
| SATCOM | Satellite Communications |
| SCC | Standards Coordinating Committee |
| SCI | Sensitive Compartmented Information |
| SCSI | Small Computer System Interface |
| SD | Standardization Directory |
| SDE | Support Data Extension (to NITF 2.0) |
| SDF | Standard Dwell Format |
| SDH | Synchronous Digital Hierarchy |
| SDTS | Spatial Data Transfer Standard |
| SDW | Special Descriptor Words |
| SED | Signal External Data |
| SEE | Software Engineering Environment |
| SFH | Super High Frequency (3-30 GHz) |
| SFS | Secure File System |
| SGML | Standard Generalized Markup Language |
| SHADE | Shared Data Environment |
| SHS | Secure Hashing Standard |
| SI | International System |
| SIA | Stable Implementation Agreement |
| SIGINT | Signals Intelligence |
| SINCGARS | Single Channel Ground and Airborne Radio System |
| SIPRNET | Secret Internet Protocol Router Network |
| SLIP/PPP | Serial Line Internet Protocol/Point to Point Protocol |
| SMTP | Simple Mail Transfer Protocol |
| SNP | Standard Network Parameters Format |
| SNR | Signal-to-Noise Ratio |
| SOI | Signals of Interest |
| SONET | Synchronous Optical Network |
| SOP | Standard Operating Procedures |
| SOR | Standard Outputs for Reporting, Exploitation, Archiving, and Dissemination |
| SP | Standardized Protocol |
| SPI | Service Provider Interface |
| SPS | Standard Positioning System |
| SQL | Structured Query Language |
| SRI | Signal Related Information |
| SRX | SIGINT Receiver |
| SSB | Single Sideband |
| SSL | 1. Standard Security Label 2. Single Site Location |
| STANAG | Standardized Agreement (NATO) |
| STD | Standard |
| S-VHS | Super VHS |
| SWAP | Size, Weight And Power |
| SYERS | Senior Year Electro-optical Reconnaissance System |
| T | |
| TACO-2 | Tactical Communications (protocol) Version 2 |
| TADIL | Tactical Data Information Link |
| TADIXS | Tactical Data Information Exchange Service |
| TAFIM | Technical Architecture Framework for Information Management (DoD) |
| TBD | To be determined |
| TBR | To be resolved |
| TC | Time Code Generator |
| TCDL | Tactical Common Data Link |
| TCP | Transmission Control Protocol |
| TCP/IP | Transfer Control Protocol/Internet Protocol |
| TCSEC | Trusted Computer Systems Evaluation Criteria |
| TDDS | Tactical Receive Equipment (TRE) and Related Applications (TRAP) Data Dissemination System |
| TDI | Trusted Database Interpretation |
| TDIS | Time/Reference Frequency Distribution Subsystem |
| TDMA | Time Division Multiple Access |
| TDOA | Time Difference Of Arrival |
| TEC | 1. Topographic Engineering Center (USA) 2. Total Electron Count |
| TEMP | Test and Evaluation Master Plan |
| TEP | Time Event Pulse |
| TFAN | Timing, Frequency and Navigation |
| TFEG | Time Frequency, Ephemeris and Geodesy |
| TFNG | Time, Frequency, Navigation and Geodesy |
| TI | Technical Intelligence |
| TIBS | Tactical Information Broadcast System (USAF) |
| TIDP-TE | Technical Interface Design Plan - Test Edition |
| TLSP | Transport Layer Security Protocol |
| TNI | Trusted Network Interpretation |
| TOA | Time of Arrival |
| TP | 1. Trust Provider 2. Transaction Processing |
| TP4 | OSI Transport Protocol Class 4 |
| TPI | Trust Provider Interface |
| TRAC | 1. Tactical Radar Correlator 2. USA TRADOC Analysis Center |
| TRAP | Tactical Receive Equipment (TRE) and Related Applications |
| TRE | Tactical Receive Equipment |
| TRIXS | Tactical Reconnaissance Intelligence Exchange System |
| TRM | Technical Reference Model |
| TSPO | Tactical SIGINT Program Office |
| TT | Time Tag |
| Tx | Transmitter |
| TX | Transaction Demarcation |
| TRPC | Transactional Remote Procedure Call |
| U | |
| UAV | Unmanned Aerial Vehicle |
| UCA | Unified Cryptologic Architecture |
| UDP | User Datagram Protocol |
| UDP/IP | User Datagram Protocol/Internet Protocol |
| UHDDR | Ultra High Digital Data Recorder |
| UHF | Ultra High Frequency (300 3000 MHz) |
| UIDL | User Interface Definition Language |
| UPE | User Portability Extension |
| USCS | United States Cryptologic System |
| USNO | United States Naval Observatory |
| USSID | United States Signals Intelligence Directive |
| UTC | Universal Coordinated Time |
| UUCP | Unix to Unix Copy Protocol |
| V | |
| VHDL | VHSIC Hardware Description Language |
| VHF | Very High Frequency (30 300 MHz) |
| VHS | Video Helical Scan |
| VHSIC | Very High Speed Integrated Circuit |
| VME | Virtual Memory Extender |
| VMF | Variable Message Format |
| VPF | Vector Product Format |
| VQ | Vector Quantization |
| VSWR | Voltage Standing Wave Ratio |
| VTCP | Voice Transfer Control Protocol |
| W | |
| WAGE | Wide Area GPS Enhancement |
| WAN | Wide Area Network |
| WG | Working Group |
| WGS | World Geodetic System |
| WRT | With Respect To |
| X | |
| XA | X/Open Architecture |
| XA+ | X/Open Architecture Plus |
| XATMI | X/Open Application to Transaction Manager Interface |
| XDR | External Data Representation |
| XLFD | X Logical Font Description |
| XPG | X/Open Portability Guide |