Paul Roberts - Typewriter Restoration Site
Fitz Niemann - Office Machine Site
Anthony Casillo's Antique Typewriter Collector's Website
Wolf-G Bluemich - Calculator Site (in german)
Brooke's Comptometer Site
Chuck & Rich's Antique Typewriter Website and Museum
Rick Bensene - Old Calculator Museum
Cuyler Brooks - Mimeograph Machines
John Sales - Underwood #5 Typewriter
Nigel Tout - Old Calculator Site
Early Typewriter Collector's Association
