Fair enough, sorry to be confusing. It is interesting that a piece of IBM early 60s mechanical design (the electric), lasted as long as it did. I don't know if there was a Selectric IV, there certainly was a Selectric III that was sold through the 70s and early 1980s. Wang created what they called word processing and only then did the Selectrics and Daisy Wheels start to slowly diminish[1]. By the 80s, when we created Stellar Computers, all of the admin's had a PC/AT and a copy of Wordperfect and used our LaserWriters in Engineering, but we still had one Selectric for times when a typewriter was easier.
Clem
1] A fun side story. One of many sisters is/was a professional concert harpist (she has incredible manual dexterity). Tough to feed yourself as a concert harpist, so she got a job at MIT working as Ron's admin. Her terminal was an ITS connection and so they taught her to edit documents using EMACS/Tex (she actually typed the RSA papers for Ron so many years ago using the same). At one point, she was thinking of leaving MIT, and when she would interview different firms, they usually would ask her if she knew 'Wang.' It's interesting that her MIT skills were the ones that lasted. For the last few years, she has worked as a technical editor/book index creator etc.. for a number of research orgs and technical book publishers -- she can handle EMACS and LaTex of course, not just MS-Word ;-)