I have never seen that mechanical calculator before, but I know that in the late 1960s, Hewlett Packard had created a portable electronic calculator. I used one of those, but it took some getting used to. But they were pretty powerful all in all.
I have never seen that mechanical calculator before, but I know that in the late 1960s, Hewlett Packard had created a portable electronic calculator. I used one of those, but it took some getting used to. But they were pretty powerful all in all.
RE: Yesterday's Technique, Or Technique Of The Past II.