| Subject | English | Thesaurus |
| univer., abbr. | Class Responsibilities And Collaboration | CRC |
| ed., abbr. | Class Work | CW |
| softw., abbr. | Classes Responsibilities And Collaborators | CRC |
| abbr., inf. | middle class | near do well (We have a lot of 'near do wells' in our community. Franka_LV) |
| abbr., comp., net. | OSI Transport Protocol Class 0 | TP0 (Simple Class) |
| AMEX., abbr. | Reading International, Inc. Class A | RDIA |
| AMEX., abbr. | Reading International, Inc. Class B | RDIB |
| telecom., abbr. | Service Class Mark | SCM |
| abbr., file.ext. | Station Class Mark | SCM |
| IT, abbr. | Transport Protocol class 0 | TP0 (OSI) |
| IT, abbr. | Transport Protocol, class 4 | TP4 (ISO) |
| abbr., ocean. | work class ROV | work class remotely operated vehicle (Logofreak) |