| Scratch Finished Product Format | |
| MIT | |
| Ads |
File with a .SCRATCH extension contains a program stored with the educational programming language – Scratch, for instance an interactive application or a simple game. Currently the .SB extension is used.
Scratch language along with the programming environment of the same name, were created in MIT for educational purposes.
| .a | Unix Static Object Code Library Format |
| .a2w | Alice Program World Format |
| .actx | DS Game Maker Action Description Format |
| .ada | ADA Language Source Code Format |
| .addin | Microsoft Visual Studio Addin Format |
| .ads | Ada Package Specification |
| .agi | Asterisk Gateway Interface Format |
| .alb | Alpha Five Data Dictionary |