[ClearCase_guy]

From wikipedia:

As of 2011, Hewlett-Packard is producing the calculator models 12C, 12C Platinum, 17BII, 20B (financial), 30B (business), 33S, 35S, 48GII and 50G (scientific) which support RPN.

[HiTech RedNeck]

50G has “The choice of efficient RPN, Textbook or Algebraic data entry”

I don’t know where they actually put the = sign.