| filename extensions | art-335 |
| cls | |
| TechTarget file types | art-336 | CLS-C-Class-Definition |
| TechTarget file types | art-336 | CLS-Visual-Basic-Class-Module |
| English | eng-000 | C++ Class Definition |
| English | eng-000 | LaTeX Document Class File |
| English | eng-000 | Visual Basic Class Module |