Y
| Ext. | Description | Used by |
|---|---|---|
| Y | Archive (Amiga) | Yabba |
| Y | YACC grammar file | Yacc/Bison |
| YAL | Data custom/nature.yal | Arts & Letters |
| YC | Archive | YACC (YAC.EXE) |
| YLIB | Yookoo Music Library Backup File | Yookoo Media Player |
| Ynn | Secondary index | Borland Paradox |
| YMP | Yast Meta Package | YAST2 (SUSE Linux Package Manager) |
| YOOKOO | Yookoo Playlist | Yookoo Media Player |
| YST | Data | YASRT Raytracer scene |
| YRD | Yard Tracks File | FYM |
| YUV | Graphics format (YUV) | |
| YY | Bison grammar file | Bison |
| YZ | Archive | YAC |
Read more about this topic: List Of File Formats (alphabetical)