Index: /en/computer/electro-mechanical.php =================================================================== --- /en/computer/electro-mechanical.php (revision 623) +++ /en/computer/electro-mechanical.php (revision 624) @@ -22,6 +22,12 @@ -
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The first electronically calculating calculators were gigantic mainframes in the 1940/50s. Until then, calculators worked mechanically. @@ -31,5 +37,6 @@
- From the first fully automatic machines (1927) until calculators with + + From the first fully automatic machines (1927) until calculators with accumulating memory (1960s), mechanical calculators computed the result indepently after user input. @@ -38,9 +45,6 @@ Looking at mechanical calculators, one quickly recognize the enormous importance of the positional notation.
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Burroughs Mod. 2. The first printing calculating machine was invented in the USA (about 1905)