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| Vintage calculator dating from 1977. © Eugene Brennan |
My
first calculator from 1977 with a fluorescent display. Who can guess
what the "D" button is for? The next one is a scientific calculator from
1984 when I started college and cost £5. Still my favourite, the Sharp
EL-506P, although I use a calculator app now. This model had an
immediate entry mode which I find more convenient than the more modern
expression input.
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| Sharp scientific calculator model EL 506 with immediate mode data entry. © Eugene Brennan |
