...I dug up an old Mathcad worksheet I did 15 years ago...
I've had Mathcad since before it was in color running on a DOS machine back in the 80's.
I remember upgrading to V3.1 and the cancelled check (what are those?) was stamped by a bankruptcy court in Boston.
Oh, I really did like that program and wrote quite a few ME applications for a lot of custom equipment.
I think the last upgrade I got from MathSoft was like V11 or to maybe V14 before they sold to PTC.
The free version of PTC MathCad is actually really good. 30 days of all functions working 100% and you can convert the old *.mcd files you created from the past to run on the PTC stuff.
This type of software really does save a heck of a lot of time because you can run countless scenarios in short order.
Well, just don't tell your Mom you wrote a random application out of thin air that calculates the number of the beast by typing in someones name. My Mom made me promise that I destroyed that one. Playing with fire... think there is a floppy or tape that may still be in existence.