The 73 came before the 89. Also, the big emphasis on the 83 over the 82 was the addition of the inferential stats package. Shawn A. Prestridge Texas Instruments, Inc. Educational & Productivity Solutions 7800 Banner Drive MS 3908 Dallas, Texas 75251 (972) 917-1698 (972) 917-7103 FAX "He's back... Kicking bottom or what?!?!" --Holly, Red Dwarf