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# Computer History Timeline A computer is a programmable electronic device that performs arithmetic and logical operations using sets of instructions given by a user. * **1969:** UNIX (first OS) - Ken Thompson & Dennis Ritchie * **1970:** C programming language * **1971:** Floppy disk - Alan Shuga...

# Computer History Timeline A computer is a programmable electronic device that performs arithmetic and logical operations using sets of instructions given by a user. * **1969:** UNIX (first OS) - Ken Thompson & Dennis Ritchie * **1970:** C programming language * **1971:** Floppy disk - Alan Shugart * **1973:** Ethernet - Robert Metcalfe * **1974:** First Personal Computer was released * **1975:** Mini computer (Altair 880) - Bill Gates & Paul Allen * **1976:** Apple Computer was founded * **1977:** Apple II - colored graphics, cassette drive for music storage * **1978:** Spreadsheet "VisiCalc", WordStar * **1981:** IBM InterCPU (Acorn) - floppy disk drive and colored graphics, MS-DOS OS