Where do the batteries go in this calculator ?
 

Attachments

  • 17373691544345600164023585063117.jpg
    17373691544345600164023585063117.jpg
    438.3 KB · Views: 6
No idea what happened to my British Thornton on, but I do have my father's one, and it's quite nice knowing that it designed bits of jet engines.
My first pocket calculator was a Sinclair something or other, it wasn't much better than a slide rule as it was so primitive I had to keep a mental note of where the decimal point was. I think it operated on a Polish Notation system. Sinclair went on to invent the Sinclair C5, another not very successful venture.
 
My first pocket calculator was a Sinclair something or other, it wasn't much better than a slide rule as it was so primitive I had to keep a mental note of where the decimal point was. I think it operated on a Polish Notation system. Sinclair went on to invent the Sinclair C5, another not very successful venture.
And the the screen had red numbers and 2 AAA batteries to power it
 
My first pocket calculator was a Sinclair something or other, it wasn't much better than a slide rule as it was so primitive I had to keep a mental note of where the decimal point was. I think it operated on a Polish Notation system. Sinclair went on to invent the Sinclair C5, another not very successful venture.
Mine was a Casio. Seem to remember that bizarrely it didn't have an = button to click on so you had to click on + or something to see the answer to your calcualtion.
 

Similar threads