K-system 1970-01-01
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Lionel Cooper (mathematician) 1970-01-01
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RCA Type 77-A microphone 1970-01-01
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Repeating waveforms 1970-01-01
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Sounds by type 1970-01-01
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Speck Electronics 1970-01-01
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Stereo imaging 1970-01-01
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Stereophonic sound 1970-01-01
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Supersonic aircraft 1970-01-01
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Buyisiwe Sondezi 1970-01-01
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CER-200 1970-01-01
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CER-202 1970-01-01
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ChipTest 1970-01-01
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Cielo (supercomputer) 1970-01-01
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CSIRAC 1970-01-01
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Duynefontein 1970-01-01
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Emanuel Derman 1970-01-01
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Tapeless production 1970-01-01
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Thamsanqa Kambule 1970-01-01
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Krell Industries 1970-01-01
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