under
| command
| Under | |
| abbr. | U |
| Command | |
| gen. | Control and Communications |
| abbr. file.ext. | .com; .cmd |
| command | |
| abbr. | com |
| mil. | control and communications system; control and identification |
| mil. abbr. | cmd; comd |
| tech. abbr. | cd |
| |||
| U | |||
|
under : 11 phrases in 6 subjects |
| Abbreviation | 4 |
| Aviation | 3 |
| Humorous / Jocular | 1 |
| Information technology | 1 |
| International transportation | 1 |
| United Nations | 1 |