As of 2022-03-07, the Wikidata property ACM Classification Code (2012) (P2179) is used on 452 items as main value on statements (not counting qualifiers) of the Q and P namespaces.

Closest properties: by cardinality of intersection, by Jaccard index.

Display properties of the following types:                                    

Closest properties by cardinality of intersection

IDLabelIntersection cardinalityJaccard index
P646 Freebase ID 386
 0.0001
P6366 Microsoft Academic ID 309
 0.0011
P3417 Quora topic ID 258
 0.0014
P31 instance of 243
 0.0000
P10283 OpenAlex ID 241
 0.0024
P373 Commons category 238
 0.0001
P910 topic's main category 237
 0.0004
P244 Library of Congress authority ID 216
 0.0002
P279 subclass of 211
 0.0001
P227 GND ID 180
 0.0001
P8189 National Library of Israel J9U ID 159
 0.0009
P18 image 156
 0.0000
P1417 Encyclopædia Britannica Online ID 147
 0.0009
P268 Bibliothèque nationale de France ID 117
 0.0002
P856 official website 113
 0.0001
P3553 Zhihu topic ID 112
 0.0077
P8408 KBpedia ID 101
 0.0026
P214 VIAF ID 100
 0.0000
P571 inception 98
 0.0000
P7859 WorldCat Identities ID 97
 0.0001
P213 ISNI 94
 0.0001
P3827 JSTOR topic ID 93
 0.0036
P1889 different from 92
 0.0001
P2347 YSO ID 86
 0.0036
P1482 Stack Exchange tag 84
 0.0216
P361 part of 83
 0.0000
P154 logo image 81
 0.0008
P349 National Diet Library ID 77
 0.0005
P17 country 77
 0.0000
P2581 BabelNet ID 74
 0.0010
P1245 OmegaWiki Defined Meaning 72
 0.0061
P8687 social media followers 72
 0.0003
P2002 Twitter username 72
 0.0002
P508 BNCF Thesaurus ID 71
 0.0042
P691 NKCR AUT ID 69
 0.0002
P269 IdRef ID 67
 0.0001
P1343 described by source 67
 0.0001
P159 headquarters location 66
 0.0002
P9100 GitHub topic 64
 0.0225
P2427 GRID ID 62
 0.0006
P6782 ROR ID 61
 0.0006
P463 member of 61
 0.0002
P1051 PSH ID 58
 0.0092
P1296 Gran Enciclopèdia Catalana ID 56
 0.0005
P4342 Store norske leksikon ID 55
 0.0007
P2924 Great Russian Encyclopedia Online ID 52
 0.0010
P2013 Facebook ID 52
 0.0002
P5398 TDKIV term ID 51
 0.0142
P2397 YouTube channel ID 51
 0.0008
P2163 FAST ID 50
 0.0001

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P4776 MAC Address Block Large ID 20
 0.0266
P1167 USB vendor ID 17
 0.0252
P9100 GitHub topic 64
 0.0225
P1482 Stack Exchange tag 84
 0.0216
P10407 Encyclopedia of Database Systems ID 10
 0.0204
P6009 Techopedia ID 14
 0.0190
P8060 Glassdoor company ID 16
 0.0166
P6611 Semantic Scholar topic ID 14
 0.0163
P5922 ANZSRC 2008 FoR ID 15
 0.0147
P3285 Mathematics Subject Classification ID 9
 0.0145
P5398 TDKIV term ID 51
 0.0142
P10206 Comparably company ID 12
 0.0137
P3743 ITU/ISO/IEC object identifier 29
 0.0132
P8529 ANZSRC 2020 FoR ID 19
 0.0130
P6422 ManualsLib brand ID 7
 0.0122
P4204 The Times of India topic ID 12
 0.0114
P5106 Dictionary of Algorithms and Data Structures ID 10
 0.0102
P6680 MeSH term ID 6
 0.0100
P1051 PSH ID 58
 0.0092
P4644 ESCO skill ID 7
 0.0092
P2226 market capitalization 11
 0.0089
P3797 autonomous system number 7
 0.0088
P7502 Golden ID 21
 0.0087
P3761 IPv4 routing prefix 13
 0.0083
P3875 Justia Patents company ID 4
 0.0082
P1709 equivalent class 12
 0.0082
P10285 Indeed company ID 5
 0.0080
P5531 Central Index Key 19
 0.0078
P3916 UNESCO Thesaurus ID 27
 0.0078
P3553 Zhihu topic ID 112
 0.0077
P3721 public key fingerprint 5
 0.0077
P7510 XML namespace 4
 0.0077
P4771 compArt institution ID 4
 0.0075
P4742 Uniform Resource Identifier Scheme 5
 0.0075
P10203 All-Science Journal Classification Codes 5
 0.0075
P9621 Treccani's Enciclopedia della Matematica ID 5
 0.0075
P4272 DPLA subject term 7
 0.0074
P920 LEM ID 7
 0.0074
P6541 Stack Exchange site 4
 0.0073
P5125 Wikimedia outline 8
 0.0073
P3221 New York Times topic ID 21
 0.0071
P6564 Brilliant Wiki ID 5
 0.0067
P2357 Classification of Instructional Programs code 4
 0.0067
P9374 ODLIS ID 4
 0.0067
P169 chief executive officer 30
 0.0066
P3393 LittleSis organization ID 25
 0.0065
P7101 privacy policy URL 8
 0.0065
P5437 EuroVoc ID 22
 0.0064
P8370 UNBIS Thesaurus ID 5
 0.0063
P1245 OmegaWiki Defined Meaning 72
 0.0061