| check-that-id-is-unique! | collect-pattern-variables | collect-until | collect-until-1 | collection-buffer | color-of-group |
| comment-begin? | comment-color | comment-glyph | comment-handling | comment-level-of-syntactical-comment | comment-string-of-syntactical-comment |
| control-frame | control-frame-pixel-height | copy-image-files? | count-versions-in | cross-reference-index-support | |
