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Pages in category "Blackboard places". The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes .
Chalkboard scraping. Scraping a chalkboard (also known as a blackboard) with one's fingernails produces a sound and feeling which most people find extremely irritating. The basis of the innate reaction to the sound has been studied in the field of psychoacoustics (the branch of psychology concerned with the perception of sound and its ...
Chalkboard (disambiguation) Chalkboard is another term for a blackboard, a board to write on with chalk. Chalkboard may also refer to: Chalkboard (typeface)
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Test Card F. Off-air screen capture of BBC Test Card F, as seen on BBC1 between 17 February 1991 and 4 October 1997. Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than four decades. Like other test cards, it was usually shown while no ...
female sign u+2642: ♂: male sign u+2660: ♠: black spade suit u+2661 ♡ white heart suit u+2662 ♢ white diamond suit u+2663: ♣: black club suit u+266d ♭ music flat sign u+266e ♮ music natural sign u+266f ♯ music sharp sign
NASA (historical) Number built. 32. Developed from. Lockheed A-12. The Lockheed SR-71 " Blackbird " is a retired long-range, high-altitude, Mach 3+ strategic reconnaissance aircraft developed and manufactured by the American aerospace company Lockheed Corporation. [N 1] The SR-71 has several nicknames, including "Blackbird" and "Habu".
Professor Yes 'n' No. Professor Yes 'n' No is a syndicated television game show which aired in the United States in 1953, in which viewers at home were the contestants. Its main claim to notability is that it was hosted by Bill Cullen, who was very popular with viewers from the 1950s to 1980s.