Top three calculators ?

[BusyCalc]

1) HP-45. As I don't need very complex calculations at work, I use it almost everyday. An there is always someone that gets attracted by its glowing display, hehehe.

2) Android's basic calculator. It has no charm, but it is always in my pocket.

3) HP-65. Inherited from my father several years after his death. After restoring it (gummy wheel, clutch, battery, etc), with it started my adiction to the classic HP calcs. It is like a collector's Rolls Royce, I insert a card once a month to check it continues doing its magic.