IC has a built-in line editor and command history, allowing editing and re-use of previously typed statements and commands. The mnemonics for these functions are based on standard Emacs control key assignments.
To scan forward and backward in the command history, type CTRL-P or
for backward, and CTRL-N or 
for
forward.
Figure 1: IC
Command-Line Keystroke Mappings
Figure 1 shows the keystroke mappings understood by IC .
IC does parenthesis-balance-highlighting as expressions are typed.