BULGARIA stamps - collecting postage stamps on computer science

BULGARIA postage stamps

20 stamps

	ID#155 Country Bulgaria Year 2003 Issue Atanasoff 1v Subject John Atanasoff, inventors of ABC (Atanasoff-Berry Computer), first digital mainframe Tag personalities
	ID#55 Country Bulgaria Year 2001 Issue Information society 2v Subject Atanasoff, mainframe ABC, at Tag e-mail personalities mainframe
	ID#56 Country Bulgaria Year 2001 Issue Information society 2v Subject @ - printed circuits Tag e-mail printed circuit
	ID#661 Country Bulgaria Year 2001 Issue Leonardo Da Vinci 1v Subject computer board under the Leonardo's vitruvian man Tag computer board
	ID#204 Country Bulgaria Year 2000 Issue Europa 2v Subject printed circuit Tag printed circuit
	ID#205 Country Bulgaria Year 2000 Issue Europa 2v Subject printed circuit - Icons, L. Da Vinci Tag printed circuit
	ID#355 Country Bulgaria Year 1991 Issue Europa Cept 2v Subject pixel Tag pixel
	ID#354 Country Bulgaria Year 1989 Issue Telecommunication 4v Subject terminal Tag terminal
	ID#203 Country Bulgaria Year 1986 Issue Communist Party 3v Subject printed circuit Tag printed circuit
	ID#304 Country Bulgaria Year 1986 Issue Communist Party 3v Subject computer design- pixel Tag pixel computer graphics
	ID#8 Country Bulgaria Year 1985 Issue International fair young workers 3v Subject pixel Tag pixel
	ID#9 Country Bulgaria Year 1985 Issue International fair young workers 3v Subject pixel Tag pixel
	ID#10 Country Bulgaria Year 1985 Issue International fair young workers 3v Subject pixel Tag pixel
	ID#719 Country Bulgaria Year 1984 Issue National government 3v Subject punched card Tag punched card
	ID#587 Country Bulgaria Year 1981 Issue Party Conference 3v Subject perforated tape Tag punched card
	ID#588 Country Bulgaria Year 1981 Issue Statistics 1v Subject perforated tape Tag punched card
	ID#353 Country Bulgaria Year 1980 Issue Plovdiv fair Subject mainframe, terminal Tag mainframe terminal network
	ID#586 Country Bulgaria Year 1979 Issue Plovdiv fair 1v Subject IZOT-0250 office machine Tag PC
	ID#738 Country Bulgaria Year 1978 Issue Plovdiv fair 1v Subject Calculator Elka 55 Tag calculator
	ID#527 Country Bulgaria Year 1974 Issue Communist party 5v Subject continuous computer paper Tag printer

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BULGARIA postage stamps

20 stamps