FprEN IEC 80000-13:2024
(Main)Quantities and units - Part 13: Information science and technology
Quantities and units - Part 13: Information science and technology
Größen und Einheiten - Teil 13: Informationswissenschaft und -technik
Grandeurs et unités - Partie 13: Science et technologies de l'information
Veličine in enote - 13. del: Informacijska znanost in tehnologija
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 80000-13:2024
01-marec-2024
Veličine in enote - 13. del: Informacijska znanost in tehnologija
Quantities and units - Part 13: Information science and technology
Größen und Einheiten - Teil 13: Informationswissenschaft und -technik
Grandeurs et unités - Partie 13: Science et technologies de l'information
Ta slovenski standard je istoveten z: prEN IEC 80000-13:2024
ICS:
01.060 Veličine in enote Quantities and units
35.020 Informacijska tehnika in Information technology (IT) in
tehnologija na splošno general
oSIST prEN IEC 80000-13:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 80000-13:2024
oSIST prEN IEC 80000-13:2024
25/774/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 80000-13 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-01-05 2024-03-29
SUPERSEDES DOCUMENTS:
25/767/CD, 25/773/CC
IEC TC 25 : QUANTITIES AND UNITS
SECRETARIAT: SECRETARY:
Italy Mr Andrea Nafi
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 1,TC 13,TC 57,TC 65,TC 100
Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of CENELEC,
is drawn to the fact that this Committee Draft for Vote (CDV) is
submitted for parallel voting.
The CENELEC members are invited to vote through the CENELEC
online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses to be
included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses.
(SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Quantities and units - Part 13: Information science and technology
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
On the TC 25/JWG 2 meeting of the 15th of October 2023, experts expressed their favour for the circulation of the CDV.
file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You may not copy
or "mirror" the file or printed version of the document, or any part of it, for any other purpose without permission in writi ng from IEC.
oSIST prEN IEC 80000-13:2024
IEC CDV 80000-13 © IEC:2023 – 2 – 25/774/CDV
1 CONTENTS
2 FOREWORD . 3
3 INTRODUCTION . 5
4 0.1 Tables of quantities . 5
5 0.2 General. 5
6 0.3 Remark on units for quantities whose dimensional exponents are all
7 equal to zero . 5
8 0.4 Numerical statements in this International Standard . 5
9 1 Scope. 6
10 2 Normative references. 6
11 3 Terms and definitions. 6
12 4 Prefixes for binary multiples . 17
13 Alphabetical index . 18
14 Bibliography . 19
16 Table 1 – Quantities and units in information science and technology . 7
17 Table 2 – Prefixes for binary multiples . 17
oSIST prEN IEC 80000-13:2024
IEC CDV 80000-13 © IEC:2023 – 3 – 25/774/CDV
19 INTERNATIONAL ELECTROTECHNICAL COMMISSION
20 ____________
21 QUANTITIES AND UNITS
23 Part 13: Information science and technology
26 FOREWORD
27 1) The International Electrotechnical Commission (IEC) is a worldwide organization for
28 standardization comprising all national electrotechnical committees (IEC National Committees).
29 The object of IEC is to promote international co-operation on all questions concerning
30 standardization in the electrical and electronic fields. To this end and in addition to other activities,
31 IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly
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33 preparation is entrusted to technical committees; any IEC National Committee interested in the
34 subject dealt with may participate in this preparatory work. International, governmental and non-
35 governmental organizations liaising with the IEC also participate in this preparation. IEC
36 collaborates closely with the International Organization for Standardization (ISO) in accordance
37 with conditions determined by agreement between the two organizations.
38 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an
39 international consensus of opinion on the relevant subjects since each technical committee has
40 representation from all interested IEC National Committees.
41 3) IEC Publications have the form of recommendations for international use and are accepted by IEC
42 National Committees in that sense. While all reasonable efforts are made to ensure that the
43 technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in
44 which they are used or for any misinterpretation by any end user.
45 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC
46 Publications transparently to the maximum extent possible in their national and regional
47 publications. Any divergence between any IEC Publication and the corresponding national or
48 regional publication shall be clearly indicated in the latter.
49 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide
50 conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not
51 responsible for any services carried out by independent certification bodies.
52 6) All users should ensure that they have the latest edition of this publication.
53 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual
54 experts and members of its technical committees and IEC National Committees for any personal
55 injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or
56 for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon,
57 this IEC Publication or any other IEC Publications.
58 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced
59 publications is indispensable for the correct application of this publication.
60 9) IEC and ISO draw attention to the possibility that the implementation of this document may involve
61 the use of (a) patent(s). IEC and ISO take no position concerning the evidence, validity or
62 applicability of any claimed patent rights in respect thereof. As of the date of publication of this
63 document, IEC and ISO had not received notice of (a) patent(s), which may be required to
64 implement this document. However, implementers are cautioned that this may not represent the
65 latest information, which may be obtained from the patent database available at
66 https://patents.iec.ch or www.iso.org/patents. IEC and ISO shall not be held responsible for
67 identifying any or all such patent rights.
68 IEC 80000-13 ED 2.0 has been prepared by IEC technical committee 25: Quantities and units
69 in close cooperation with ISO/TC 12 Quantities and units. It is an International Standard.
oSIST prEN IEC 80000-13:2024
IEC CDV 80000-13 © IEC:2023 – 4 – 25/774/CDV
70 This second edition cancels and replaces the first edition published in 2008. This edition
71 constitutes a technical revision.
72 This edition includes the following significant technical change with respect to the previous
73 edition:
74 addition of new prefixes for binary multiples.
76 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
78 Full information on the voting for its approval can be found in the report on voting indicated in
79 the above table.
80 The language used for the development of this International Standard is English.
81 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
82 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
83 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
84 described in greater detail at www.iec.ch/publications.
85 The committee has decided that the contents of this document will remain unchanged until the
86 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
87 specific document. At this date, the document will be
88 • reconfirmed,
89 • withdrawn,
90 • replaced by a revised edition, or
91 • amended.
oSIST prEN IEC 80000-13:2024
IEC CDV 80000-13 © IEC:2023 – 5 – 25/774/CDV
93 INTRODUCTION
94 0.1 Tables of quantities
95 In most cases only one name and only one symbol for the quantity are given; where two or more
96 names or two or more symbols are given for one quantity and no special distinction is made,
97 they are on an equal footing. When two types of italic letters exist (for example as with J and θ;
98 φ and f; a and a; g and g) only one of these is given. This does not mean that the other is not
99 equally acceptable. It is recommended that such variants should not be given different
100 meanings. A symbol within parenthesis implies that it is a reserve symbol, to be used when, in
101 a particular context, the main symbol is in use with a different meaning.
102 0.2 General
103 The names of units for the corresponding quantities are given together with the international
104 symbols and the definitions. These unit names are language-dependent, but the symbols are
th
105 international and the same in all languages. For further information, see the SI Brochure (9
106 edition 2019, updated in 2022) from BIPM and ISO 80000-1.
107 The units are arranged in the following way:
108 • The coherent SI units are given first. The SI units have been adopted by the General Conference
109 on Weights and Measures (Conférence Générale des Poids et Mesures, CGPM). The use of
110 coherent SI units, and their decimal multiples and submultiples formed with the SI prefixes are
111 recommended, although the decimal multiples and submultiples are not explicitly mentioned.
112 • Some non-SI units are then given, being those accepted by the International Committee for Weights
113 and Measures (Comité International des Poids et Mesures, CIPM), or by the International
114 Organization of Legal Metrology (Organisation Internationale de Métrologie Légale, OIML), or by
115 ISO and IEC, for use with the SI. Such units are separated from the SI units in the item by use of a
116 broken line between the SI units and the other units.
117 0.3 Remark on units for quantities whose dimensional exponents are all equal to zero
118 The coherent unit for any quantity whose dimensional exponents are equal to zero is the number
119 one, symbol 1. When the value of such a quantity is expressed, the unit symbol 1 is generally
120 not written out explicitly.
121 EXAMPLE 1
122 Refractive index n = 1,53 × 1 = 1,53
123 Prefixes shall not be used to form multiples or submultiples of this unit. Instead of prefixes, powers of 10 are recommended.
124 EXAMPLE 2
125 Reynolds number Re = 1,32 × 10
126 0.4 Numerical statements in this International Standard
127 The sign = is used to denote "is exactly equal to", the sign is used to denote "is approximately
128 equal to", and the sign := is used to denote "is by definition equal to".
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130 QUANTITIES AND UNITS
132 Part 13: Information science and technology
136 1 Scope
137 This part of IEC 80000 specifies names, symbols and definitions for quantities and units used
138 in information science and technology. Where appropriate, conversion factors are also given.
139 Prefixes for binary multiples are also given.
140 2 Normative references
141 There are no normative references in this document.
142 3 Terms and definitions
143 For the purposes of this document, the following terms and definitions apply.
144 ISO and IEC maintain terminology databases for use in standardization at the following
145 addresses:
146 • IEC Electropedia: available at https://www.electropedia.org/
147 • ISO Online browsing platform: available at https://www.iso.org/obp
148 The names, definitions and symbols for quantities and units of information science and
149 technology are given in Table 1 on the following pages.
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151 Table 1 – Quantities and units in information science and technology
Item No. Quantity U
...
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