| AGT | Advanced German Technology |
| ATI | Advanced Technology Institute |
| AT | Advanced Technology [engl.] PC-Industrie-Standard von Microsoft |
| ADAT | Air Defense Advanced Technology [engl.] Verbesserte Luftabwehrtechnik |
| ADT | Advanced DRAM Technology [engl.] |
| AET | Advanced Educational Technology [engl.] |
| SALT | SuSE Advanced Linux Technology |
| APT | Advanced Parallel Technology [engl.] |
| ATF | Advanced Technology Fighter [engl.] |
| PC / AT | Personal Computer / Advanced Technology |
| AIT | Advanced Information Technology [engl.] |
| NTAS | Windows New Technology Advanced Server |
| ATG | Advanced Technology Group [engl.] |
| IAMT | Intel Advanced Management Technology |
| ATA | Advanced Technology Attachment [engl.] |
| ACTI | Advanced Computational Technology Initiative [engl.] |
| ASTA | Advanced Software Technology and Algorithms [engl.] |
| ASIT | Advanced Security and Identification Technology [engl.] |
| CEATA | Consumer Electronics Advanced Technology Attachment |
| M.A.S.K. | Mobile Armored Strike Kommand vgl. http://www.m-a-s-k.de/ |
| ATAPI | Advanced Technology Attachment Peripherical Interface [engl.] |
| ECDL | European Conference on Research and Advanced Technology for Digital Libraries |
| AIST | National Institute of Advanced Industrial Science and Technology [engl.] Japan, http://www.aist.go.jp |
| ATB | Advanced Technology Bomber [stealth bomber] [engl.] |
| JIC | Joint Industry Council |
| JCS | Joint Chiefs of Staff |
| JAA | Joint Aviation Authorities |
| JTC | Joint Technical Committee [ISO/IEC] |
| JVT | Joint Video Team |
| JIC | Joint Intelligence Center |
| Spliff | Slangausdruck für einen Joint Name einer deutschen Musikgruppe |
| JET | Joint European Torus Europäisches Gesamtprojekt zur Kernfusion |
| JANET | Joint Academic Network |
| JRC | Joint Research Centre |
| JC | Joint Compound [plumbing] |
| JAD | Joint Application Design |
| JUST | Joint Users of Siemens Telecommunications |
| JCET | Joint Council on Educational Television |
| JISC | Joint Information Systems Committee London/ Bristol/ Nottingham, http://www.jisc.ac.uk |
| JTAG | Joint Test Action Group |
| JPEG | Joint Photographic Experts Group |
| JOSS | Joint Object Services Submission |
| JSRC | Joint Services Review Committee |
| JBIG | Joint Bilevel Image Group |
| AMJ | Advisory Material Joint [engl.] Normen in der Luftfahrtindustrie |
| RONJA | Reasonable Optical Near Joint Access |
| JCAC | Joint Civil Affairs Committee |
| JCAE | Joint Committee on Atomic Energy |
| SJCC | Spring Joint Computer Conference |
| JILA | Joint Institute for Laboratory Astrophysics |