| 41. | .urls | List of Internet shortcuts (Universal Resource Locator) |
| 42. | .urt | Bitmap graphics (Utah Run-Length Encoded image file) |
| 43. | .use | Log file ◊ Source Integrity file (MKS) |
| 44. | .usp | Printer font with US Ascii extended character set (PageMaker) |
| 45. | .usr | Audit trail file (Pro/Engineer) ◊ User database (Procomm Plus - Turbo C++ tour) |
| 46. | .ustar | Compressed file archive (POSIX tar) |
| 47. | .uu | Encoded file archive (ascii) (uudecode - uuencode) |
| 48. | .uud | Encoded file archive (ascii) (uuencode) |
| 49. | .uue | Encoded file archive (ascii) (uuencode) |
| 50. | .uw | Sound (Raw Unsigned PCM Word (16bit) data) |
Top 10 
Feedback