Kboom11 (informally called "Kboom") is a file compression utility developed by Miles Pawski. Its compression scheme is a kind of LZW.
The "11" seems to be part of its name, not a version number.
It doesn't have a default filename extension.
Files start with signature bytes
a8 'M' 'P' a8.
- Kboom11 (DOS binary + assembly language source code)