Editing Engineering Research Associates (section)

==Goldberg and Demon codebreakers==
Their first machine, Goldberg, completed in 1947, used a crude drum made by gluing [[magnetic tape]] to the surface of a large metal cylinder that could be spun at 50 RPM for reading (and much slower for writing). Over the next few years, the drum memory systems increased in capacity and speed, along with the [[paper tape]] readers needed to feed the data onto the drums. They later ended up in a major patent fight with Technitrol Engineering, who introduced a drum memory of their own in 1952.

One of the follow-on machines, Demon, was built to crack a specific Soviet code. In 1949 the code was changed, rendering the machine useless. James Pendergrass, a Navy officer attached to the codebreaking unit, had attended a series of lectures at the [[Moore School of Engineering]] at the [[University of Pennsylvania]] in 1946, and became convinced the only lasting solution to the code breaking problem was a computer that could be quickly re-programmed to work on different tasks. In 1947 the Navy awarded ERA a contract, "Task 13", to develop what was destined to be the first [[stored program]] computer in the U.S. The machine, known as the [[Atlas I computer|Atlas]], used [[drum memory]] and was delivered in 1950. ERA then started to sell it commercially as the '''[[UNIVAC 1101|ERA 1101]]''', 1101 being binary for 13. Even before delivery of the Atlas, the Navy asked for a more powerful machine using both [[Williams tube]]s and drum memory, a machine known as the [[Atlas II computer|Atlas II]]. Work began in 1950 and the completed Atlas II was delivered to the still-secret [[National Security Agency|NSA]] in September 1953.