圖書館的藏書中，數字或字母的編碼、書櫃或書架標記，或者其他形式的符號，用來識別某特定項目，代表該項目的主題內容，以及其收藏擺放的書架位置。

索書號碼(P,,U,繁體中文-偏好,D,U,U)
圖書編目號碼(,U,繁體中文-非偏好,UF,U,U)
so shu hao ma (P,,U,韋氏拼音-偏好,UF,U,U)
suǒ shū hào ma (P,,U,漢語拼音-偏好,UF,U,U)
suo shu hao ma (P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
call numbers(P,,U,英文-偏好,D,U,PN)
call number(,U,英文-非偏好,AD,U,SN)
class number(,U,英文-非偏好,AD,U,SN)
Signatur(,U,German-非偏好,AD,U,SN)
classificatie-nummer(,U,荷蘭語-非偏好,AD,U,SN)
signatuur(classificatie-nummer)　(,U,荷蘭語-非偏好,UF,U,SN)
indice de classification(,U,法語-非偏好,AD,U,SN)
numero di classificazione(,U,Italian-非偏好,AD,U,SN)
klassifikationsnummer(,U,Swedish-非偏好,AD,U,SN)
signatura sistemática(,U,西班牙語-非偏好,AD,U,SN)

藝術與建築詞典根目錄
....物件層面
........視覺及語言傳達
............資訊形式 (層級名)
................<資訊形式 (先導詞)>
....................<文件類型>
........................<依功能區分之文件類型>
............................<識別符號與標誌>
................................符號 (標誌)
....................................<依功能區分之標記>
........................................索書號碼

distinguished from....

登錄號

英文....	Numeric or alphanumeric codes, press-marks or shelf-mark, or other sets of symbols identifying a particular item or items in a library collection, expressing the subject contents of the item and its shelving location.

索書號碼............	[AS-Academia Sinica]
.................	國家教育研究院－雙語詞彙、學術名詞暨辭書資訊網 September 13, 2011
圖書編目號碼............	[AS-Academia Sinica]
.................	朗文當代大辭典 235
.................	智慧藏百科全書網 September 13, 2011
call numbers............	[VP]
.................	Random House Dictionary of the English Language (1983)
.................	ALA [online] (n.d.)
.................	Oxford English Dictionary Online (2002-)
call number............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
class number............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
Signatur............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
classificatie-nummer............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
signatuur(classificatie-nummer)............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
indice de classification............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
numero di classificazione............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
klassifikationsnummer............	[VP]
.................	IFLA Glossary for Art Librarians (1984)
signatura sistemática............	[VP]
.................	IFLA Glossary for Art Librarians (1984)

Getty AAT: 300311706 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300311706
聯合目錄： 索書號碼 、圖書編目號碼 、so shu hao ma 、suǒ shū hào ma 、suo shu hao ma 、call numbers 、call number 、class number 、Signatur 、classificatie-nummer 、signatuur 、indice de classification 、numero di classificazione 、klassifikationsnummer 、signatura sistemática