Who is An Wang?

An Wang was the co-creator of a pulse transfer control device. This used the magnetic field of the core to control the switching of the current in a magnetic core memory device. He invented the write-after-read cycle. The process of reading the data stored in a magnetic core memory device destroys the data in what is called a destructive read out. The write-after-read cycle rewrote the data to the core making it more practical to use. He founded Wang Laboratories which became a multi-billion dollar electronic company with 30,000 employees at one point. He was awarded a core memory patent for his write-after-read cycle invention. He sold this patent to IBM for $500,000 and used the money to expand his company with a partner. In mid 1960s, he invented a digital logarithmic converter that made it possible to perform routine arithmetic electronically at high speeds and relatively low cost. The company made huge profits selling the calculators designed with the help of his invention.

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