Zet is a compressed archive utility for DOS, and its associated file format. It was developed by Oleg V. Zaimkin.
The software seems to be modeled after PKZIP.
Zet files seem to contain tagged segments, each beginning with "
A possible signature is that Zet files begin with bytes
'O' 'Z' dd, and end with
'O' 'Z' de 06 68 7c.