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TIL that titular typing tutor of 80s PC program "Mavis Beacon Teaches Typing" was the creation of one of the software developers, who sought to present a "friendly face" for a generation of very new and very wary computer users. Mavis was inspired by a Haitian-born woman named Renee L’Esperance.

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e0YX6 TIL that 30 years ago you had 15-17 minutes to escape a house fire. Nowadays you only have 3-5 minutes (due to more plastics & petroleum-based products in the house as well as more open floor plans, bigger rooms, & higher ceilings).
md9v TIL of ‘Tetris Effect’, where a person devoting a large amount of time to a particular pattern-based activity(which in this case is Tetris) will start unconsciously thinking and dreaming about it
JYnP4 TIL that rock band Iron Maiden went to a restaurant after a 1984 concert in Poland. The Maidens saw a wedding inside; after a chat, they took the wedding band's instruments and began playing for the night. Guests had no idea until the groom saw that his wedding band transformed into Iron Maiden.
gMbgD TIL Jim Jones was an American psychopathic cult leader so charismatic and persuasive that he was able to convince people to assassinate a congressman, an NBC TV crew, and his own 1,222 followers to commit suicide
lOP1 TIL that Espresso Book Machine, a print on demand machine developed to print, collate and bind a paperback book in a couple of minutes. Since its debut at the New York Public Library in 2007, the machine is now in 70 bookstores and libraries in the world.