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1949 -An Wang files a patent for magnetic core memory using ferrite. It was entitled “pulse transfer controlling devices.” This was the first sign and the rise of Wang industries – a company that would be a dominant computer to IBM until it’s fall in 1992.This Day in Tech History podcast show notes for October 21

• the Electronic Communications Privacy Act goes into Law
• Windows NT 4 SP4 is released
• Jerry Yang send email to employees and 1,400 cuts