Example image of eyePlorer eyePlorer map for 'History of computing hardware': Calculator Slide rule Integrated circuit Transistor Vacuum tube Tyranny of numbers Timeline of computing History of computing Computer data storage Bijection Finger counting Tally stick Fertile Crescent Abacus Babylonia Roman abacus Counting house Analog computer Ancient Greece Antikythera mechanism Astrolabe Al-Jazari Astronomical clock Computer programming Camshaft Gate operator Heliocentric orbit Hour Lever Lunar orbit Lunar phase Pointer (computing) Robot Water wheel Zodiac Daytime (astronomy) Night John Napier Napier's bones Real number Wilhelm Schickard Johannes Kepler Kepler's laws of planetary motion Blaise Pascal Zwinger Gottfried Leibniz Pascal's calculator Stepped Reckoner Arithmometer Charles Xavier Thomas