IBM used all sorts of non-standard terminology of their own. You'd hear their folks seriously talking about PELs instead of Pixels ("Picture Elements"); and DAS

IBM used all sorts of non-standard terminology of their own. You'd hear their folks seriously talking about PELs instead of Pixels ("Picture Elements"); and DASDs (pronounced "dah-z-dee") instead of disks ("Direct Access Storage Device"). Not clear if it was intentionally designed to be alienating to outsiders, but it sure seemed cultish.