| Subject | English | Thesaurus |
| tradem., abbr. | Co-operators Investment Counselling Limited | CICL |
| abbr., O&G, tengiz. | Formal Operator Training Program | FOTP (Yeldar Azanbayev) |
| abbr., commun. | Network Operator Services | NOS |
| abbr., scottish | Non-materiel Individual Enhancement for the SOF Operator programme | NIESO (US Army) |
| IT, abbr. | Operator Services Assistance Center | OSAC |
| busin., abbr. | Operator Services Center | OSC |
| telecom., abbr. | Operator Services System | OSS |
| comp., abbr. | Program- Operator Communication | POC |
| transp., abbr. | Tour Operators Program Of Safety | TOPS |
| abbr., auto. | Vehicle and Operator Services Agency | VOSA (kotechek) |
| ed., abbr. | Welding Operator Qualification Program | WOQP |
