History of computers By FoxyGranda Jan 1, 1623 Slide rule Jan 1, 1645 Plascaline Jan 1, 1674 Step Reckoner Jan 1, 1791 Charles Babbage Jan 1, 1804 Punch Card Loom Jan 1, 1944 Harvard Mark 1 Jan 1, 1946 Eniac Jan 1, 1951 Univac Jan 1, 1991 World Wide Web