| .xxx |
Compucon Singer Embroidery File |
| .xensearch |
XenCenter Saved Search File |
| .ybk |
Microsoft Encarta Yearbook File |
| .ybd |
YobiDrive Link File |
| .yps |
Yahoo! Messenger Data File |
| .ymg |
Yahoo! Messenger File |
| .ztf |
DVD Label Template File |
| .ztr |
DVD Label Template Media File |
| .zm1 |
ZoneAlarm Renamed MDA File |
| .zm2 |
ZoneAlarm Renamed MDZ File |
| .zm3 |
ZoneAlarm Renamed NCH File |
| .zml |
Zooming Markup Language File |
| .zvpl |
Visual Paradigm License File |
| .z80 |
TI-83 and 84 Plus Calculator File |
| .zzz |
CCleaner Securely Deleted File |
| .z1 |
ZoneAlarm Renamed VB File |
| .zm9 |
ZoneAlarm MailSafe Renamed Zip File |
| .bnf |
IBM Voice Type languages map data |
| .btl |
INMOS bootable file |
| .oops |
Oops file |
| .nab |
Netscape Communicator addressbook |
| .idq |
SQL Structured Query Language query file |
| .xdm |
X-Windows dump file |
| .ufm |
Unicode TrueType font |