Calculator - Calculating machines - Monroe
Olympia - Typewriter
Photocopier - Gispert
Folding machine - Pitney Bowes
Typewriter - Drawing table - Amersfoort
Calculator - Calculating machine - Addo
Post-it - 3M - Sticky notes - Sponsor 1988 Olympics
Scryption - Writing
Calculator - DAP
Typewrtter - Calculating machine - Olympia
IBM
Counting - Calculating machines - Contex
Calculator - Counting machine - Accounting machine
Calculator - Counting machine - Cash register - Victor
Typewrtter - Calculating machine
Measuring paper
Typewriter - Royal
IBM - 50 years of electric typewriters
Paperclip