- File extension "cyc"
- File extension "cxs"
- File extension "cxl"
- File extension "cwf"
- File extension "cw2"
- File extension "cvm"
- File extension "cvj"
- File extension "curl"
- File extension "ctw"
- File extension "ctc"
- File extension "cs3"
- File extension "crh"
- File extension "crb"
- File extension "cqe"
- File extension "cpz"
- File extension "cpu"
- File extension "cmw"
- File extension "cme"
- File extension "clu"
- File extension "ckc"
- File extension "ckb"
- File extension "cis"
- File extension "cib"
- File extension "chq"
- File extension "cgd"
- File extension "cgc"
- File extension "cfz"
- File extension "cfu"
- File extension "cd1"
- File extension "cc5"