by Category

by Manufacturer

• Slide Rules
• Slide Adding Machines ("Addiators")
• Small Rotary Adding Machines
• Pin-Wheel Calculators
• Key-Driven Calculators ("Comptometers")
• Printing Calculators ("Add-list machines")
• Full-Keyboard Rotary Calculators
• Full-Function Ten-key Calculators
• Miniature Full-Function Calculators
  
  
  
  
  
  
• Full Index by Make and Model
• Technical section - mechanisms, manuals, repairs...
  

• Brunsviga
• Burroughs
• Bell Punch Company (PLUS and Sumlock)
• Contex
• Egli, Hans W (Millionaire and MADAS)
• Facit
• Felt & Tarrant (Comptometer)
• Friden
• Lagomarsino (Numeria and Totalia)
• Marchant
• Monroe
• Olivetti
• Olympia
• Original-Odhner
• Victor
• Walther

by Brand Name

Other Manufacturers

• Canon
• Casio
• Compucorp
• Facit
• Friden
• Hewlett-Packard
• Olivetti
• Sanyo
• Sharp

• Overview of Early Developments
  
  
• Other Brands - Desktop
• Other Brands - Portable
• Calculators in the Laboratory
  
  
  
• Full Index by Make and Model
• Technical section - mechanisms, manuals, repairs...