I occasionally drop my "Everybody hates math know-it-alls" defense and use the word Octothorpe. It never fails that someone challenges it as a made up word, so I'm just posting this so that when they ask I can reference a source.... Ok, I'm not unknowing of the circular reference, but hey, they may not think of that, so here goes:
Octothorpe: In the 1960's when Bell Telephone added two new buttons for push button telephones, they used the * symbol and the # symbol. Although most people call the * an asterisk, the telephone folks decided to use "star". The other symbol, #, has been called lots of different names such as crosshatch, tic-tac-toe, the pound sign, and the number sign (leave it to the telephone company to put the number sign on one of the two keys without a number); but the term now used by the American telephone industry for the symbol is octothorpe although it is more often called the pound key in conversations with the public. It seems that the name was made up more or less spontaneously by Bell Engineer Don MacPherson while meeting with their first potential customer. The octo part was chosen because of the eight points at the ends of the line segments, and the thorpe was in honor of Jim Thorpe, the great Native American athlete.
Why honor Thorpe? At the time MacPherson was working with a group that was trying to restore Thorpe's Olympic medals, which had been taken from him when it was found he had played semi-professional baseball prior to his track victories in the Olympics in Sweden. [It's not math, but I love the story that when the King of Sweden gave him the gold medal, the king said, "You are surely the greatest athlete on the earth". The modest Thorpe smiled and replied, "Thanks, King."]
There are a host of other names for the # symbol, and many of them can be found at this page from Wikipedia which includes several different stories about the creation of "octothorpe" or "octothorn" and also has this rather interesting clip:
"The pronunciation of # as `pound' is common in the US but a bad idea. The British Commonwealth has its own, rather more apposite, use of `pound sign. On British keyboards the UK pound currency symbol often replaces #, with # being elsewhere on the keyboard. The US usage derives from an old-fashioned commercial practice of using a # suffix to tag pound weights on bills of lading. The character is usually pronounced `hash' outside the US. There are more culture wars over the correct pronunciation of this character than any other, which has led to the ha ha only serious suggestion that it be pronounced `shibboleth' (see Judges 12:6 in an Old Testament or Tanakh)." The page also disputes the use of "square" in Britain.
Merriam-Webster's online dictionary give the following variety of origins for the term:
"Most of those tales link the name to various telephone workers in the 1960s, and all claim the "octo-" part refers to the eight points on the symbol, but the "thorpe" remains a mystery. One story links it to a telephone company employee who happened to burp while talking about the symbol with co-workers. Another relates it to the athlete Jim Thorpe, and a third claims it derives from an Old English word for "village." If the plethora of theories leaves your head spinning, you might want to take the advice of the wag who asked (poetically), "Can we simply just say, / Ere it spoils your day, / It's the thorp between seven and nine?""
Just to be clear, I show these other "mistaken" ideas for intellectual honesty, but my origin of the naming is, as you must now know, the correct one.
Originally posted on my now obsolete Math Words and Other Words blog.
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