CZECHOSLOVAKIA stamps - collecting postage stamps on computer science

CZECHOSLOVAKIA postage stamps

	ID#367 Country Czechoslovakia Year 1986 Issue 125th Anniversary of Scientist Union 3v Subject computer design Tag computer graphics
	ID#368 Country Czechoslovakia Year 1986 Issue 125th Anniversary of Scientist Union 3v Subject computer design Tag computer graphics
	ID#881 Country Czechoslovakia Year 1979 Issue Definitives 4v Subject printed circuit Tag printed circuit
	ID#726 Country Czechoslovakia Year 1966 Issue Space explorations 6v Subject binary code Tag binary code