| JTAG | Joint Test Action Group |
| etc | etc-group, Action group on erosion, technology and concentration Ottawa, http://www.etcgroup.org |
| AIAG | Automotive Industry Action Group [engl.] Southfield, [MI], http://www.aiag.org |
| JPEG | Joint Photographic Experts Group |
| JBIG | Joint Bilevel Image Group |
| jpg | JPEG [Joint Photographic Experts Group] compression |
| CAPA | Corrective Action Preventive Action [engl.] Massnahme zur Vermeidung nachträglicher Änderungen |
| TOTE | Test Operate Test Exit |
| RAST | RadioAllergoSorbent Test [allergy test] |
| CPA | Cost-Per-Action Online-Marketing Kenngröße |
| B.A. | bonne action [frz.] "Die tägliche "gute Tat" der Pfadfinder" |
| ECA | Event, Condition, Action |
| MPA | Minimum Perceptable Action |
| MIA | Missing In Action [engl.] im Kampf vermisst |
| HAI | Health Action International Amsterdam, http://www.haiweb.org |
| KIA | Killed In Action [engl.] im Kampf gefallen |
| PAC | Political Action Committee |
| KMAL | Kinetic Mass Action Law |
| UAR | User Action Routine |
| BAP | Biodiversity Action Plan [engl.] |
| BAM | Boyan Action Module [engl.] |
| FRAG | Flood Risk Action Groups |
| For. Fr. action for. | Forêts de France et action forestière Zeitschrift |
| PLAN | Public Lands Action Network |
| ASH | Action on Smoking and Health [engl.] Britische Antirauchergruppe |
| CAT | Continuous Action Tamping [engl.] Kontinuierliches Gleisstopfverfahren |
| FACS | Facial Action Coding System |
| LAG | least-action ground state approximation |
| AIDA | Attention, Interest, Desire, Action AIDA-Prinzip: Abkürzung für die wichtigsten Aufgaben, die eine Werbung zu erfüllen hat |
| CAQ | Covert Action Quarterly [Zeitschrift] New York, [NY], http://www.covertaction.org |
| STAR | Special Telecommunication Action for Regional Development EU-Strukturhilfsprogramm |
| AITS | Action Item Tracking System [engl.] Aus der Weltraumforschung |
| AVEA | Action végétariste pour l'égalité animale [frz.] Tierschutzverband |
| AIDA | Attention, Interest, Desire, Action [engl.] Formel für die Wirkungsstufen einer Werbemassnahme |
| JC | Joint Compound [plumbing] |
| JANET | Joint Academic Network |
| JAA | Joint Aviation Authorities |
| JVT | Joint Video Team |
| JIC | Joint Intelligence Center |
| JIC | Joint Industry Council |
| JET | Joint European Torus Europäisches Gesamtprojekt zur Kernfusion |
| Spliff | Slangausdruck für einen Joint Name einer deutschen Musikgruppe |
| JRC | Joint Research Centre |
| JCS | Joint Chiefs of Staff |
| JAD | Joint Application Design |
| JTC | Joint Technical Committee [ISO/IEC] |
| SJCC | Spring Joint Computer Conference |
| CJTF | Combined Joint Task Forces |
| RONJA | Reasonable Optical Near Joint Access |
| JADE | Joint Asian Derivatives Exchange vgl. http://www.ses.com.sg |