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Calculator? Ah yes, I traded in my slide rule for a Texas Instruments SR-10 within months of it coming on the market.
I used a slide rule all the way through school. Hand-held calculators came out later.
My first hand-held calculator was a Commodore MM2SR that in 1975 cost approximately $200. The calculator had memory storage, square, square root, and reciprocal functions. The calculator no longer works but I still have the device and original leather case.
Second calculator was a TI SR-40, also long ago defunct, now stored in its leather case in a box in the basement.
That was not the first hand-held calculator I saw. My physics teacher had purchased a Heathkit calculator that was as big as a shoe box but nonetheless portable. After he finished soldering and assembling the parts he could add, subtract, multiply, and divide with the new device.
Oh yes --- I still own my one and only Pickett slide rule, model no. N1010-ES, serial no. A1417274, with 17 scales and leather carrying case. Now a conversation piece, although the tool could be useful if the proverbial TEOTWAWKI ever arrived.
I quite like this term for designating age, though perhaps it should be scaled to fit actual storm designations so we're not accused of "going up to 11" or anything silly like that. Hmmm, so a logarithmic scale then?