p - paginate p [ - number ] [ file ... ] P copies its standard input, or the named files if given, to its standard output, stopping at the end of every page, to wait for a newline from the user. The option sets the number of lines on a page (default: 22).

While waiting for a newline, p interprets the commands:

! Pass the rest of the line to the shell as a command.

q Quit.

/appl/cmd/p.b