Differences from MPE
The Break key will not stop Qedit in the middle of a long :Listf or other command. You may want to use :Break and :Resume to do a long :Listf. Control-Y sometimes stops a :Listf on certain versions of MPE/iX, but generally Control-Y doesn’t stop most commands. Control-Y does stop a compile if the compiler has been “fixed” to use our interface routines to read Qedit source files. The Qedit syntax for Prep and Run is more forgiving than in MPE; you can abbreviate the keywords, leave out the commas, and use default parameter values. Qedit adds a number of new commands that MPE forgot — Reflect, Display, Pause, Activate, Kill.
Unlike Qedit commands, MPE commands cannot normally be shortened, and only one may be entered per command line. You will find MPE commands handy to check files (listf), to check users (showjob), to redirect files (file lp = $stdlist), to compile without leaving Qedit, to 
rep (or :Link on MPE/iX), and to :Run programs:
/listf /file lp;dev=serialp /cobol *,,lp /prep {$oldpass to $newpass by default} /run {defaults to $oldpass}