When I run ps it returns: PID TT STAT TIME COMMAND 750 p5 Ss 0:00.09 -tcsh (tcsh) 751 p5 R+ 0:00.00 ps 247 v0 Is 0:00.18 -tcsh (tcsh) but the man page says that ps sorts output by process ID. Is this a bug, documentation error, or I am confused? Thanks! Mike.