From Just Solve the File Format Problem
CP/M, devised by Roger Warren in the late 1980s. It came later than Squeeze and Crunch and generally achieved better compression than those formats. LZH files occurred standalone and as members in LBR archives. The underlying compression is based on that used by LHArc.CrLZH (often referred to as just "LZH", but not to be confused with the format used for .lzh files) was a method of compressing single files used on
Similar to Squeeze and Crunch, these files were signified in CP/M's 8.3 filename format by replacing the middle letter of the extension with Y (.?Y?), with the extension .YYY used for corner cases such as a blank extension.
- CFX (DOS/Unix)
- lbrate by Russell Marks, c. 2001 (Unix, GPL2)
- On CP/M (or emulators):