csh: csh (C shell from BSD) csh: csh: The C shell was originally written at UCB to overcome limitations in csh: the Bourne shell. Its flexibility and comfort (at that time) quickly csh: made it the shell of choice until more advanced shells like ksh, csh: bash, zsh or tcsh appeared. Most of the latter incorporate features csh: original to csh. csh: csh: This build is based on OpenBSD sources from 2011. csh: csh: