| $ | Visual Basic Symbols Data |
| $$m | 3D Gamestudio Backup Map Data |
| $01 | DOS Pipe File |
| $b | TR-DOS Basic Data |
| $dx | CA Visual Objects Index Backup |
| 1st | Visual FoxPro Documenting Wizard List |
| 1t | Fortran 1T Data |
| 2clk | Frontier for Mac Script |
| 2la | 2LANG Data |
| 2lang | 2LANG Data |
| 33b | SYNETSIM QuickBasic Source Code |
| 3dfbat | 3DField Script |
| 3dmlw | 3D Markup Language for Web Document |
| 3mp | TTCN-3 Source Code |
| 3xe | 3DLinX Entity Data |
| 42m | Genero BDL Compiled Module |
| 4da | 4D User Forms Data |
| 4ge | IBM Informix 4GL Compiled Code |
| 4gl | IBM Informix 4GL Source Code |
| 4ma | FileMaker Pro Runtime Database |
| 4th | Forth Source Code |
| 4ui | ForeUI Plot |
| a | Ada Source Code |
| a | Free Pascal Archive |
| a1 | Free Pascal Compiled Archive |
| a1 | OpenEdge ABL After Image |
| a2 | OpenEdge ABL After Image |
| a31 | Adobe Authorware Library |
| a3c | Alan v3 Adventure Code |
| a3l | Adobe Authorware Library |
