HP Calculator Timeline

Vintage Electronic Calculator Manuals

Ernst Mulder's Calculator Collection
MyCalcDB : Pocket Calculators Database/Museum

Spyropoulos Calculator Website

hpcalc.org

DATAMATH  Caclulator Museum

Vintage Calculators Web Museum

HP calculators and space exploration
Educalc.net

HPCC: Handheld And Portable Computer Club

Tim Wessman's HP Calculator Stuff
Kees van der Sanden calculator collection
The Museum of HP Calculators
        Gerardo's Calculator Collection
Interesting Links

 

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TheCalculatorStore.com

Tony's Calculator Collection  http://www.thimet.de/CalcCollection/Contents.html

HP-15C Clone:   http://www.rpn-calc.ch/