Im Artikel <323c666a.143223@nntp.ix.netcom.com>, BlakLite@ix.netcom.com (Robert Fisher) schreibt: >I haven't THOUROUGHLY read the TI-92 manual, but I noticed that if you type >"OK" >in the home screen, data entry, or any other data entry area, it returns "1". OK is a system variable. It is listed on page 491 in my reference manual. However, there's no explanation on what it is good for. Joe