Top three calculators ?

[Alevin]

Out of the HP and RPN universe, but my #1, 2 and 3 is the popular and best seller

CASIO FX-880P

Pocket Computer style from the 80`s. Not the most powerful of the era, but unbeatable as product balanced in performance, usability, and size/weight.

Light weight (6.0 oz with batteries, without hard case) compact size (3½"×7"×½") thin enough to be carry in a shirt pocket without rip it.

BASIC programmable, simple to use in all modes. Direct scientific functions in a separated keyboard plus full alphabetic keyboard.

Generous LCD screen 2 lines x 32 characters (not graphic)-

32 to 64 KB RAM, plus 116 built in functions in ROM. (FX-880p is an updated version of CASIO FX-850P from 1987, launched with only 8KB RAM).

CASIO FX-880P copied and improved the SHARP PC-1450 design concept from 1985.

Nowadays in Europe, FX-880P is quite easy to find second hand (from 70 to 200 euros), and virtually bought immediately, not by nostalgic users, but by users than still make CASIO FX-880p its main calculator for daily work, either at desk or out of the office (grab an go).