| The File Extension | Mime Type |
| .123 File Extension | application/x-lotus123 |
| .3db File Extension | application/octet-stream |
| .3dp File Extension | application/octet-stream |
| .3ds File Extension | application/x-3ds |
| .3dx File Extension | application/octet-stream |
| .abc File Extension | application/octet-stream |
| .abw File Extension | application/abiword |
| .accdb File Extension | application/msaccess |
| .accde File Extension | application/msaccess |
| .accdr File Extension | application/msaccess |
| .accdt File Extension | application/msaccess |
| .ade File Extension | application/vnd.ms-access |
| .adp File Extension | application/vnd.ms-access |
| .agr File Extension | application/octet-stream |
| .aib File Extension | application/octet-stream |
| .ans File Extension | text/x-ansi |
| .apr File Extension | application/vnd.lotus-approach |
| .arr File Extension | application/octet-stream |
| .asc File Extension | application/x-pgp |
| .asd File Extension | application/octet-stream |
| .ase File Extension | text/plain |
| .atom File Extension | application/atom+xml |
| .avl File Extension | application/octet-stream |
| .aws File Extension | application/octet-stream |
| .awt File Extension | application/abiword |
| .aww File Extension | application/octet-stream |
| .ban File Extension | application/octet-stream |
| .bbs File Extension | text/plain |
| .bfc File Extension | application/octet-stream |
| .biz File Extension | application/octet-stream |