From: Bob Patton
Email: see text
The TI Math Explorer does this. It's probably not made now, but is fairly common in the used market. Try garage sales, thrift stores or flea markets. It's a thin solar LCD calc with a light blue case. I have two. Contact me at my-last-name at thrifty dot net if you want to try a mail order. thrifty dot net
[_private/calc1_aftr.htm]