| .nbak |
Neat Backup File |
| .nb7 |
NovaBACKUP Output File |
| .nbt |
Minecraft Named Binary Tag File, Nero BackItUp Template File |
| .nrbak |
NeatReceipts Backup File |
| .nwbak |
NeatWorks Backup File |
| .nda |
Nero Backup File |
| .noy |
NOY Backup File |
| .nrs |
NovaBACKUP Restore Script |
| .old |
Backup File |
| .orig |
Original File |
| .obk |
Backup File |
| .ori |
Original File |
| .oeb |
Outlook Express Backup Wizard File |
| .oyx |
Approach Alternate Database Index |
| .onepkg |
Microsoft OneNote Package File |
| .pdb |
Program Database |
| .pbj |
Pixel Bender Bytecode File |
| .ptb |
Sage 50 Backup File |
| .psa |
Unreal Engine Skeletal Animation File |
| .paq |
Hewlett-Packard Software Restore File |
| .prv |
Vue Preview File |
| .pbd |
EaseUS Todo Backup File |
| .pbf |
Paragon Backup File |
| .pbx5script |
Personal Backup Script |