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- Two-out-of-five_code abstract "In telecommunication, a two-out-of-five code is an m of n code that provides exactly ten possible combinations, and thus is popular for representing decimal digits using five bits. There are ways to assign weights to each bit such that the set bits sum to the desired value, with an exception for zero.According to Federal Standard 1037C: each decimal digit is represented by a binary numeral consisting of five bits of which two are of one kind, called "ones," and three are of the other kind, called "zeros", and the usual weights assigned to the bit positions are 0-1-2-3-6. However, in this scheme, zero is encoded as "binary" 01100; strictly speaking the 0-1-2-3-6 previously claimed is just a mnemonic device.The weights give a unique encoding for most digits, but allow two encodings for 3: 0+3 or 10010 and 1+2 or 01100. The former is used to encode the digit 3, and the latter is used to represent the otherwise unrepresentable zero.The IBM 7070, IBM 7072, and IBM 7074 computers used this code to represent each of the ten decimal digits in a machine word, although they numbered the bit positions 0-1-2-3-4, rather than with weights. Each word also had a sign flag, encoded using a two-out-of-three code, that could be A Alphanumeric, − Minus, or + Plus. When copied to a digit, the three bits were placed in bit positions 0-3-4. (Thus producing the numeric values 3, 6 and 9, respectively.)A variant is the U.S. Post Office POSTNET barcode, used to represent the ZIP+4 code for automated mail sorting and routing equipment. This uses two tall bars as "ones" and three short bars as "zeros". Here, the weights assigned to the bit positions are 7-4-2-1-0. Again, zero is encoded specially, using the 7+4 combination (binary 11000) that would naturally encode 11. This method was also used in North American telephone Multi-frequency and crossbar switching systems.[1]The USPS Postal Alpha Numeric Encoding Technique (PLANET) uses the same weights, but with the opposite bar-height convention.The following table represents decimal digits from 0 to 9 in various two-out-of-five code systems:The limit on the number of bits set is similar to, but strictly stronger than, a parity check. All constant-weight codes, including the two-out-of-five code, can not only detect any single-bit error, but also detect any unidirectional errors -- any case where all errors in a codeword are of a single type (0→1 or 1→0).".
- Two-out-of-five_code thumbnail Barcode2of5example.svg?width=300.
- Two-out-of-five_code wikiPageExternalLink xbr%20relays.shtml.
- Two-out-of-five_code wikiPageID "41828".
- Two-out-of-five_code wikiPageLength "3965".
- Two-out-of-five_code wikiPageOutDegree "35".
- Two-out-of-five_code wikiPageRevisionID "659087749".
- Two-out-of-five_code wikiPageWikiLink 0_(number).
- Two-out-of-five_code wikiPageWikiLink Barcode.
- Two-out-of-five_code wikiPageWikiLink Berger_code.
- Two-out-of-five_code wikiPageWikiLink Category:Barcodes.
- Two-out-of-five_code wikiPageWikiLink Category:Computer_arithmetic.
- Two-out-of-five_code wikiPageWikiLink Category:Telephony_signals.
- Two-out-of-five_code wikiPageWikiLink Constant-weight_code.
- Two-out-of-five_code wikiPageWikiLink Crossbar_switch.
- Two-out-of-five_code wikiPageWikiLink Decimal.
- Two-out-of-five_code wikiPageWikiLink Federal_Standard_1037C.
- Two-out-of-five_code wikiPageWikiLink IBM_7070.
- Two-out-of-five_code wikiPageWikiLink IBM_7072.
- Two-out-of-five_code wikiPageWikiLink IBM_7074.
- Two-out-of-five_code wikiPageWikiLink M_of_n_codes.
- Two-out-of-five_code wikiPageWikiLink Mnemonic.
- Two-out-of-five_code wikiPageWikiLink Multi-frequency.
- Two-out-of-five_code wikiPageWikiLink Multi-frequency_signaling.
- Two-out-of-five_code wikiPageWikiLink Numerical_digit.
- Two-out-of-five_code wikiPageWikiLink POSTNET.
- Two-out-of-five_code wikiPageWikiLink Parity_bit.
- Two-out-of-five_code wikiPageWikiLink Parity_check.
- Two-out-of-five_code wikiPageWikiLink Postal_Alpha_Numeric_Encoding_Technique.
- Two-out-of-five_code wikiPageWikiLink Telecommunication.
- Two-out-of-five_code wikiPageWikiLink Unidirectional_error.
- Two-out-of-five_code wikiPageWikiLink United_States_Postal_Service.
- Two-out-of-five_code wikiPageWikiLink ZIP_Code.
- Two-out-of-five_code wikiPageWikiLink ZIP_code.
- Two-out-of-five_code wikiPageWikiLink File:Barcode2of5example.svg.
- Two-out-of-five_code wikiPageWikiLink File:Correios_CEP_22011-080_-_Codigo_de_Barras_-_PU1JFC.jpg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_0.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_1.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_2.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_3.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_4.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_5.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_6.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_7.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_8.svg.
- Two-out-of-five_code wikiPageWikiLink File:POSTNET_9.svg.
- Two-out-of-five_code wikiPageWikiLinkText "2 of 5 code".
- Two-out-of-five_code wikiPageWikiLinkText "2 out of 5 code".
- Two-out-of-five_code wikiPageWikiLinkText "Code 25 – Non-interleaved 2 of 5".
- Two-out-of-five_code wikiPageWikiLinkText "Two-out-of-five code".
- Two-out-of-five_code wikiPageWikiLinkText "two-out-of-five code".
- Two-out-of-five_code hasPhotoCollection Two-out-of-five_code.
- Two-out-of-five_code wikiPageUsesTemplate Template:Barcodes.
- Two-out-of-five_code subject Category:Barcodes.
- Two-out-of-five_code subject Category:Computer_arithmetic.
- Two-out-of-five_code subject Category:Telephony_signals.
- Two-out-of-five_code hypernym M.
- Two-out-of-five_code type Article.
- Two-out-of-five_code type Place.
- Two-out-of-five_code type Article.
- Two-out-of-five_code type Encoding.
- Two-out-of-five_code type Identifier.
- Two-out-of-five_code type Source.
- Two-out-of-five_code comment "In telecommunication, a two-out-of-five code is an m of n code that provides exactly ten possible combinations, and thus is popular for representing decimal digits using five bits.".
- Two-out-of-five_code label "Two-out-of-five code".
- Two-out-of-five_code sameAs To_af_fem-kode.
- Two-out-of-five_code sameAs Deux_parmi_cinq.
- Two-out-of-five_code sameAs קוד_שתיים-מתוך-חמש.
- Two-out-of-five_code sameAs 5者択2符号.
- Two-out-of-five_code sameAs m.0bhlf.
- Two-out-of-five_code sameAs Q2778226.
- Two-out-of-five_code sameAs Q2778226.
- Two-out-of-five_code wasDerivedFrom Two-out-of-five_code?oldid=659087749.
- Two-out-of-five_code depiction Barcode2of5example.svg.
- Two-out-of-five_code isPrimaryTopicOf Two-out-of-five_code.