In the spring of 1948 Howard Aiken (1900–1973) hired Wang to work at the Harvard Computation Laboratory. This institution had built the ASSC Mark I, one of the world’s first digital computers, a few years earlier and was developing more advanced machines under a contract from the U.S. Air Force. Aiken asked Wang to develop a way to store and retrieve data in a computer using magnetic devices. Wang studied the magnetic properties of small doughnut-shaped rings of ferromagnetic material, or materials that can become highly magnetized. Wang soon developed a process where one could read the information stored in a ring by passing a current around it.
In the mid-1960s Wang invented a digital logarithmic converter that made it possible to perform routine arithmetic electronically at high speeds and relatively low cost. Wang desktop calculators were soon available commercially, replacing traditional machines with mechanical parts. Several calculators operated on one processing unit. These early electronic calculators sold for over one thousand dollars per keyboard.
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.