[jmclnx]

clamshell, that is a name from the past. But has nothing to do with Apple

>Clam is a Unix(tm) shell that has many features of tcsh, sh and improvements all its own.

>Clam is copyright (c) 1988 by Callum Gibson. Clam is provided free of charge.

This came on CohWare Vol1 with Cohorent OS and gave one a small csh(1) environment. I think it was for the 286 version of Coherent which I used back then.

[hoppyhoppy2]

>d : a hinged container, case, or cover that opens like the shell of a clam

https://www.merriam-webster.com/dictionary/clamshell