;APMBC: Anti-Personnel Mine Ban Convention
;ArcGIS: It is a software suite developed by ESRI Inc. IMSMA incorporates the ArcGIS Engine to display the geographical data in the map pane
;Auxiliary Data: Additional data that should be defined before data entering. These include organisations, places, ordnance classification, cause classification, needs classification, assistance classification.
;AXO: Abandoned Explosive Ordnance