| AND | |
| abbr. auto. | and circuit |
| abbr. avia. | army/navy drawing |
| abbr. IT | Logical AND; any day now |
| abbr. med. | Allow Natural Death |
| abbr. mil. | alphanumeric display |
| abbr. oil | Advanced Digital Network; alphanumerical display; Andorra |
| processing unit | |
| IT | mainframe |