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Z3
The Z3 is example of a German electromechanical computer by Konrad Zuse and is considered the 1st programmable, automatic computer. It was use to write and solve wing flutter problems. Even though it was completed in 1941 in Berlin, it was not used by the German government for war efforts. Funding was not given to developed and it destroyed in the Allied bombardment of Berlin in 1943. -
Atanasoff–Berry computer (ABC)
The Atanasoff–Berry computer (ABC) was developed by John Vincent Atanasoff and Clifford Berry at Iowa State University. Though hotly debated, it is considered the 1st automatic electronic digital computer and first electronic Arithmetic Logic Unit. It was a contribution in creation of faster calculations using vacuum tubes. -
Mk 1 Colossus
Mk 1 Colossus was one of two computers developed by British codebreakers to decipher German coded messaged in World War II. Mk 1 was developed by Tommy Flowers, Sidney Broadhurst, and William Chandler. It used vacuum tubes to perform Boolean and counting program. -
Harvard Mark I
Developed by Harvard University staff and IBM, Harvard Mark I was created for general calculations in the later years of World War II by the Americans. Also known as IBM Automatic Sequence Controlled Calculator (ASCC), used punched paper tape to read instructions. The design of this computer was later expanded upon after the war and used in branches of the US military. -
ENIAC (Electronic Numerical Integrator and Computer)
Financed by the United States Army and developed in secret as "Project PX" by an engineering team at the University of Pennsylvania, ENIAC (Electronic Numerical Integrator and Computer) used multiple components to calculate large numerical problem. This computer was made and used in secret because it was created in part to study thermonuclear science.