| Subject | English | Thesaurus |
| abbr. | Career Options On Line | COOL |
| abbr., telecom. | CF line | carrier frequency line |
| railw., abbr. | Costa Line Cargo Services | CLGU |
| abbr., file.ext. | Culham One-line Single Experimental Consol | COSEC |
| abbr., scottish | Fire Support Co-ordination Line | FSCL |
| IT, abbr. | Integrated Services Line Module | ISLM |
| IT, abbr. | Integrated Services Line Unit | ISLU |
| transp., abbr. | Main & Bergen Co Line | MNBN |
| media., abbr. | Microphone Program Line | MPL |
| comp., abbr. | On- Line Test Executive Program | OLTEP |
| abbr. | Program for Administrative Traffic Reports On Line | PATROL |
| progr., abbr. | Program Line | PL |
| IT, abbr. | Remote Integrated Services Line Unit | RISLU |
| O&G. tech. | service line valve | SLV (MichaelBurov) |
| mil., abbr. | Single Line Missile Assembly | SLMA |
| mil., abbr. | Single Line Missile Assembly Building | SLMAB |
| softw., abbr. | Straight Line Program | SLP |
| abbr., scottish | Top Line Co. | TLC (USA) |
| IT, abbr. | Total On-Line Program and Information Control System | TOPICS |
| abbr., scottish | Vertical Line Arrange DIFAR | VLAD |
| abbr., O&G | wire line log evaluation program ELAN of Schlumberger | ELAN (MichaelBurov) |
| AMEX., abbr. | Wireless On- Line Services | WOLS |
