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- Recommendation B.191)
- ABBREVIATIONS AND INITIALS USED IN TELECOMMUNICATIONS
- The CCITT,
- considering
- (a) the rapid increase in the number of abbreviations and initials used in
- the texts of the CCIs;
- (b) that it is sometimes difficult to find the precise meaning of an
- abbreviation or acronym appearing in a text of the CCIs,
- recommends
- (1) that, with the exception of abbreviations frequently used in
- telecommunications, abbreviations and acronyms should not be used in the texts of
- the CCIs unless they make the text easier to read, i.e. when an abbreviation may
- be used several times in the same text;
- (2) that, with the exception of abbreviations frequently used in
- telecommunications the first time an abbreviation is used in a particular text
- its full meaning should be given, either in the body of the text or in a
- footnote;
- (3) that at alphabetical list of the abbreviations used in the CCI volumes
- should be published either at the end of each volume or in a separate fascicle2),
- 3)
- (4) that for abbreviations specific to certain fields, the Administrations,
- CCI Secretariats and other participants in the work of the CCIs should use the
- abbreviations which appear in the publications listed in Appendix I.
- APPENDIX I
- (to Recommendation B.19)
- References to lists of specific abbreviations
- I.1 Frequency and wavelength bands
- See Recommendation B.15.
- I.2 Alphabets, codes, routing codes and identities
- See the relevant CCITT Recommendations (Index of the Blue Book, Fascicle
- I.4).
- I.3 Codes contained in the Radio Regulations
- I.3.1 Designation of emissions: Article 2.
- I.3.2 Symbols for the various types of antenna: Appendix 2, Section III.
- I.3.3 Q code, general section (QRA to QUZ): Appendix 13, Section I.
- I.3.4 Miscellaneous abbreviations: Appendix 13, Sections I and II.
- I.3.5 SINPO and SINPFEMO codes: Appendix 15.
- I.4 Abbreviations used by the ITU for the names of countries
- See the Preface to the International Frequency List, Table I. (Different
- abbreviations have been approved by ISO.)
- I.5 Acronyms of international organizations involved in telecommunications
- See the ITU "List of Adddresses", S 3.
- I.6 Symbols and names for units
- I.6.1 Recommendation B.3 gives the sources to be used. This Recommendation
- refers to IEC Publication 27 and to ISO International Standards 31 and 1000.
- I.6.2 Recommendation B.14: Terms and symbols for information quantities in
- telecommunications.
- I.6.3 Recommendation B.15: (Note 2) - Frequency unit.
- I.6.4 Recommendation B.12: Use of the decibel and the neper in
- telecommunications.
- I.6.5 Recommendation B.18: Traffic intensity unit.
- I.7 Letter symbols
- Recommendation B.1: "Letter symbols for telecommunications" provides
- guidelines to be followed to simplify the reading of documents dealing with
- telecommunication techniques; it refers to IEC Publication 27 and to ISO
- International Standard 31 for letter symbols to represent physical quantities and
- mathematical operations.
- I.8 Chemical symbols
- See the table published by the International Union of Pure and Applied
-
- 1) CCIR Recommendation 666 is concerned with the same subject.
- 2) An alphabetical list of the abbreviations used in the CCITT volumes is published
- in Part V of this fascicle.
- 3) CCIR Recommendation 666 contains in its Appendix I, a list of about 100
- abbreviations, in general use by the CCIR Study Groups and which are arranged by
- subject together with the corresponding abbreviations in the three working languages.
-
-
-
- Fascicle I.3 - Rec B.19 . PAGE1
-
- Chemistry (IUPAC).
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- PAGE2 Fascicle I.3 - Rec. B.19
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