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The abacus, invented by the Babylonians, is regarded as the basis of modern calculators and computers. |
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Contemporary calculators and computers were devised on the basis of the abacus, which was invented by the Babylonians. |
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The abacus, on the basis of which modern calculators and computers were devised, was first used by the Babylonians. |
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The Babylonians invented the abacus and today it is regarded as the basis of contemporary calculators and computers. |
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The abacus, regarded as the basis of contemporary calculators and computers, was invented by the Babylonians. |