| ID | Name | Type |
|---|---|---|
| #19268 | Aposoft | P |
| #20493 | AppSir Games | P |
| #1211 | Appleby Structured Systems | Z |
| #1212 | Appledean Systems | Z |
| #1213 | Applications Software Specialities | Z |
| #1214 | Applied Programming Techniques | Z |
| #1215 | Applied Systems Knowledge Ltd | P |
| #17045 | Applied Technology | H |
| #1216 | April Fool | ? |
| #1217 | Aprisobal | ? |
| #18312 | Apropos Technology | P |
| #1218 | Aqua Soft | Z |
| #22720 | Aquanauts Holiday | P |
| #1219 | Aquarius Edizioni | Z |
| #1220 | Aquarius Software | Z |
| #1221 | ArSoft Corp. | Z |
| #1222 | Aragorn | - |
| #1223 | Arajp | ? |
| #1224 | Aratz Juanes | ? |
| #19162 | Arbitrary Files | Z |