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Exactly one ''bi'' bit and one ''quinary'' bit is set in a valid digit. The bi-quinary encoding of the internal workings of the machine are evident in the arrangement of its lights – the ''bi'' bits form the top of a T for each digit, and the ''quinary'' bits form the vertical stem.
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! Value || 05-01234 bits<ref name="Ledley_1960"/>
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The [[Remington Rand 409]] has five bits: one ''quinary'' bit (tube) for each of 1, 3, 5, and 7 - only one of these would be on at the time. The fifth ''bi'' bit represented 9 if none of the others were on; otherwise it added 1 to the value represented by the other ''quinary'' bit. The machine was sold in the two models [[UNIVAC 60]] and [[UNIVAC 120]].
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! Value || 1357-9 bits
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The [[UNIVAC Solid State]] uses four bits: one ''bi'' bit (5), three binary coded ''quinary'' bits (4 2 1)<ref name="Steinbuch_1962"/><ref name="Steinbuch-Wagner_1967"/><ref name="Steinbuch-Weber-Heinemann_1974"/><ref name="Dokter_1973"/><ref name="Dokter_1975"/><ref name="Savard_2018_Decimal"/> and one [[parity bit|parity check bit]]
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! Value || p-5-421 bits
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The [[UNIVAC LARC]] has four bits:<ref name="Savard_2018_Decimal"/> one ''bi'' bit (5), three [[Johnson counter]]-coded ''quinary'' bits and one parity check bit.
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! Value || p-5-qqq bits
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