Excess-3

"XS-3" redirects here. For the experimental aircraft, see Douglas XS-3 Stiletto.
"Shifted binary" redirects here. For the general concept, see Offset binary. For binary shifts, see Bit shifting.

Stibitz code
Digits4[1]
Tracks4[1]
Digit values8  4 −2 −1
Weight(s)1..3[1]
ContinuityNo[1]
CyclicNo[1]
Minimum distance1[1]
Maximum distance4
Redundancy0.7
Lexicography1[1]
Complement9[1]

Excess-3, 3-excess[1][2][3] or 10-excess-3 binary code (often abbreviated as XS-3,[4] 3XS[1] or X3[5][6]), shifted binary[7] or Stibitz code[1][2][8][9] (after George Stibitz,[10] who built a relay-based adding machine in 1937[11][12]) is a self-complementary binary-coded decimal (BCD) code and numeral system. It is a biased representation. Excess-3 code was used on some older computers as well as in cash registers and hand-held portable electronic calculators of the 1970s, among other uses.

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  2. ^ a b Cite error: The named reference Steinbuch-Weber_1974 was invoked but never defined (see the help page).
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  12. ^ Cite error: The named reference Ritchie_1986 was invoked but never defined (see the help page).