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Today in Computing History in 1981, IBM introduced its first personal computer (PC), the IBM Model 5150. Although personal computers already existed, IBM’s entry into the market brought mainstream attention thanks to its brand recognition and marketing power. The IBM PC sold 65,000 units in just four months, setting a new benchmark for the industry. It quickly dominated the market and defined the “IBM-compatible” era, maintaining its lead until Apple introduced the Macintosh in 1984.

, 22 July 1952 (or just after) Prof. Virginia Apgar presents her new way of testing the health of newborn babies to a professional congress.

Apgar’s name is used as a mnemonic for the tests, which assess activity (tone), pulse, grimace, appearance, and respiration. This is a backcronym, where someone has picked words that will create an acronym that is also a specific name.

The Apgar test has saved countless newborn lives.