Vintage calculators
Old calculators: desk mechanical & electronic; british hand-held british sterling currency #sd calculators; comptometers; photographs showing the old technology including early integrated circuits and delay line memories; collector showing pictures of collection from many years of collecting.
www.vintagecalculators.com/   reviews

Museum of Soviet Calculators
Museum of Soviet calculators. Displays handheld and desktop calculators from the 1900s to the present, showing interesting features of each.
www.taswegian.com/MOSCOW/soviet.html   reviews

Calculating Machines
Mechanical Calculating Machines - This site by by Erez Kaplan, is all about mechanical calculating machines. It includes chronological description, classification and pictorial view (dozens of photographs), books, organizations and much more. ...
www.webcom.com/calc/   reviews

Computissimo - Musee de l'Histoire de l'Informatique de Philippe Marmy
Computissimo - Musee de l'Histoire de l'Informatique - vous ouvre ses portes ! Venez visiter les collections de micro-ordinateurs, IBM, calculatrices electroniques et mecaniques, consoles de jeux, microprocesseurs et toutes sortes de supports de donnees.
www.computissimo.ch/   reviews