:

.1
Unix Section 1 Man Page N/A
.113
Iomega Backup File N/A
.123
Lotus 1-2-3 Spreadsheet IBM
.123c
Autodesk 123C Drawing Autodesk
.123d
Autodesk 123D Drawing Autodesk
.123dx
123D Design Model File Autodesk
.1pe
TurboTax Form File N/A
.1ph
TurboTax File N/A
.1st
Readme File N/A
.256
Descent 2 Color Palette File Interplay
.264
Ripped Video Data File N/A
.2bp
Pocket PC Bitmap Image File N/A
.2d
VersaCAD 2D Drawing File Archway Systems
.2fs
Puppy Linux Save State File Puppy Linux