Optional
| Protocol
| optional abbr. | |
| comp., MS | opțional |
| Protocol abbr. | |
| econ. | protocol |
| protocol abbr. | |
| econ. | protocol |
| |||
| opțional (Pertaining to a component, parameter and so on that is not required or automatic) | |||
| English thesaurus | |||
| |||
| opsh | |||
| opt. | |||
| |||
| o/p | |||
| O | |||
|
Optional : 15 phrases in 4 subjects |
| General | 5 |
| Health care | 2 |
| Human rights activism | 6 |
| Microsoft | 2 |