Not
| Unix
| NOT | |
| abbr. avia. | Novato, California USA |
| abbr. electr.eng. | number of turns |
| abbr. IT | Logical NOT; Notation or note |
| abbr. met. | nondestructive test |
| abbr. O&G, sakh. | notice of termination |
| abbr. O&G, sakh.a. | Non-Destructive testing; nondestructive testing |
| abbr. physiol. med. | Not On Tobacco |
| abbr. railw. | New Orleans Terminal |
| UNIX | |
| abbr. | The United Nations Intelligent Xylophone; Not an acronym at all.; Orginally UNICS, for Uniplex Information and Computing System |
| abbr. el. | a multiuser time-sharing system |
|
Not : 35 phrases in 12 subjects |
| Abbreviation | 7 |
| Aviation | 3 |
| Computer networks | 1 |
| Electronics | 1 |
| General | 1 |
| Humorous / Jocular | 2 |
| Ironical | 14 |
| Military | 1 |
| NASA | 2 |
| Sports | 1 |
| United States | 1 |
| University | 1 |