Bibliography

• Computers on Stamps and Stationery, Volume 2
  by Larry Dodson - ATA Handbook 152 - 2004
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• Computers on Stamps and Stationery
  by Larry Dodson - ATA Handbook 134 - 1998
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• Very useful books for every computer stamps collector, each stamp is identified with Scott catalog numbers.

Sites about computer related stamps

• Philatelica.ro
• From Abacus to Laptop
• Cyber Philately
• Dutch Computer Stamps
• Mathematicians on Postage Stamps
• Filatelia e Informática
• Informatique et Télécommunications

Where to buy computer stamps

• Ebay stamps online auctions
• Del Campe - Philately - Topic: Computers online auctions
• FreeStampCatalogue dutch online stamp dealer

Other philatelic sites

• WNS (WADP Numbering System) Stamps of the world from year 2002
• Stamp Websites
• Stamp Collector Links
• Stamp Shows
• StampLink
• Jan Langenberg's Homepage A lot of info and pictures from (weird) stamps, revenues, perfins, zemstvos etc. from Russia, Hungary and Denmark.
• Il Postalista Italian online magazine about philately and postal history.