Zaman sebelum tahun 1940
3000SM – Alat Penghitung Abakus
1614 - Tulang John Napier
1642 - Pascal Pascaline (Kalkulator pertama)
1694 - Alat Pendarab Leibniz
1777 - Mesin Logik
1801 - Mesin Kad Tebuk Jacquard’s Loom
1820 - Mesin kira De Colmar
1821 - Enjin perbezaan Babbage
1842 - Enjin Analytical Babbage
1890 - Mesin Tabulasi Hollerith
Zaman selepas tahun 1940
1944 – Mark 1 – mencipta elektro-mekanikal
1946 – ENIAC
1948 – EDVAC
1951 – UNIVAC
1964 – IBM Siri 360
1981 – IBM PS1
1984 – Apple Macintosh
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