[_swa8]

Not only that, there's a historical program called Arc that is also a file archiver/compressor. It led to PKZIP.

[_swa8]

Come to think of it, a variant of it is still packaged in Debian, package is called "arc".

Incidentally, for anyone choosing a name, the namecheck program from the Debian devscripts package is handy for checking if a particular name is already in use. Not perfect, but handy anyway.