HP-10bII+ hardware

[Gene]

The key to the 10bII+ was squeezing in all those scientific, statistical and new financial functions:

trigs
hyperbolics
permulations and combinations
Normal and Students t distributions and inverses
lots of regression models including best fit
bonds
breakeven
depreciation
date arithmetic

without breaking any previously existing 10bII functionality.

Amazing job, IMO.

If only it had RPN. :-)