O Alternately suppresses and continues display of output to the screen. CTRL-T Momentarily interrupts screen output to display a single line of statistical information about the current process. CTRL-U Discards the current input line. CTRL-V Passes the next character typed to the system without interpreting it. ESC Has special uses within some programs.
TAB Moves the cursor to the next tab stop on the terminal.
The system provides tab stops at every eighth character position on a line. Notes Certain systems and user programs provide special routines to respond to CTRL-C interrupts.