Dan N. DOBRESCU - Computer stamps catalog, AXA 2011       Wobbe VEGTER - Cyber Philately   Johann VANDENHAUTE - From Abacus to Laptop     Vito GALGANO - Computer related stamps - a topical collection   Dan N. DOBRESCU - Computer stamps (catalog)     Michel LANDRIEU - Informatique et télécommunications   Teunis van BEEK - Computers on stamps     Larry DODSON - Computers on stamps   Fédération des Equipes BULL     Mathematical Study Unit   Mathematics and computation I - IV     V. GUSTIN - Computer History on Stamps   Postage ATM stamps     Study Group Postal Automation   Letter mail mechanization     J. CURA - Filatelica e Informatica   Fran ADAMS - Digital Philatelic Workshop     Dan N. DOBRESCU - Communication through a computer   Mathematik und Informatik Briefmarken / Mathematics and Informatics on Stamps