1. operating system A record of previous user inputs (e.g. to

a command interpreter) which can be re-entered without

re-typing them. The major improvement of the C shell (csh)

over the Bourne shell (sh) was the addition of a command

history. This was still inferior to the history mechanism on

VMS which allowed you to recall previous commands as the

current input line. You could then edit the command using

cursor motion, insert and delete. These sort of history

editing facilities are available under tcsh and GNU Emacs.