Quantum compressed archive
From Just Solve the File Format Problem
Quantum compressed archive is an archive format developed by Cinematronics corporation. It runs on a normal computer, not a quantum computer.
Files begin with bytes
'D' 'S'. The next byte (the major version number) is probably always
- quant097.zip (old MS-DOS and Windows binaries)
- Some Microsoft CAB files use the same "Quantum" compression scheme as this format.