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Inventor: George Stibitz The Complex Number Calculator is a relaty-based calculator that was the first demonstration of remote access computing as the invention is capable of performing calculating complex numbers -
Inventor: Konrad Zuse The Z3 Computer is a computer that is used for aerodynamic calculation that uses 2,300 relays, performs floating point binary arithmetic, and has a 22-bit word length. Unfortunately, the computer was destroyed in a bombing raid on Berlin in the late 1943. -
Inventor: Howard Aiken The Harvard Mark 1 is a relay-based calculator as big as a room. This calculator had thousands of component parts and uses 3,500 relays. It was able to produced mathematical tables but would be replaced by electronic stored-program computers. -
Inventors: Gordon Brown & Jay Forrester Project Whirlwind was started during the World War II, first started as an analog computer to help pilot training and simulation. It was then shifted into a digital system as Whirlwind introduced a faster magnetic core memory which would be a core type of memory till the 1970s -
Inventors: Frederic WiIliams, Tom Kilburn, and Geoff Toothill The SSEM, Small-Scale Experimental Machine or known as the Manchester "Baby." It was built to test the new memory technology known as the Williams Tube, the first high-speed electronic random access memory for computers.