25 File Extensions starting with a Number or Symbol
| .!S | ZX Spectrum Hobetta Image |
| .$C | ZX Spectrum Hobetta Image |
| .$S | ZX Spectrum Hobetta Image |
| .001 | Ricoh Fax Image |
| .001 | SmartFax Image |
| .123 | IBM Lotus 1-2-3 Spreadsheet |
| .16 | LSS16 Image |
| .2BP | Pocket PC Bitmap Image |
| .2D | Amapi Image |
| .301 | Brooktrout 301 Image |
| .3FR | Hasselblad 3F RAW Image |
| .3G2 | 3G Mobile Phone Video |
| .3GP | 3G Mobile Phone Video |
| .411 | Mavica Image |
| .4BIT | GoDot Image |
| .4BT | GoDot Image |
| .73I | TI Bitmap Image |
| .7Z | 7-Zip Compressed Archive |
| .82I | TI Bitmap Image |
| .83I | TI Bitmap Image |
| .85I | TI Bitmap Image |
| .86I | TI Bitmap Image |
| .89I | TI Bitmap Image |
| .92I | TI Bitmap Image |
| .[B] | Amica Paint Image |