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Contents   Fixed field   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx

050  Library of Congress Call Number (R)

Input Standards

Required if applicable/Optional
1st Indicator  Existence in LC collection
blank character No information provided
0 Item is in LC
1 Item is not in LC
2nd Indicator  Source of call number
blank character No information provided
0 Assigned by LC
4 Assigned by agency other than LC
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards
‡a Classification number (R) Mandatory/Mandatory
‡b Item number (NR) Required if applicable/Required if applicable
‡3 Materials specified (NR) Optional/Optional

Definition

The LC call number and/or class number.

Use field 050 with 1st indicator value blank and 2nd indicator value 4 (e.g., 050 14 LB890 ‡b .B52 1978) for LC call numbers assigned by agencies other than LC.

If you assign a Library of Congress classification number according to the LC class schedules, use field 050 with 1st indicator value blank or 1 and 2nd indicator value 4, or field 090, although use of field 050 is preferred. If the classification portion of your number does not conform to the LC class schedules, use field 099.

Use field 055, field 060, or field 070 for call numbers based on LC classification schedules and assigned by the Library and Archives Canada, the National Library of Medicine, or the National Agricultural Library, respectively. Use field 099 for classification numbers that are local modifications of LC class numbers.

See "Map and atlas call numbers" below for information on entering and printing map and atlas call numbers.

If you are transcribing LC copy, enter LC call numbers in field 050. However, LC does not classify some types of material. LC copy for unclassified material may have the phrase NOT IN LC. If you are transcribing such copy, do not include this phrase in field 050. You may enter a locally assigned call number in field 050 with 1st indicator value blank and 2nd indicator value 4.

Guidelines

 
Microform shelf numbers

Prior to 1981, LC used a single-record technique to indicate the microform replacement of an original item for preservation. Such records contain both the call number of the original and the microform shelf number of the replacement.

Pre-1981 replacement shelf numbers include a term that designates the type of microform (e.g., "Microfilm") and a number of one-to-five digits. The number may also include additional words, notations (e.g., "reel 1, no. 3"), and, usually, a class letter or letters from the LC classification system. Enter such shelf numbers in subfield ‡a. Enter a space between each element.

050 0 0 Microfilm 19072 E
050 0 0 Microfilm 8124 reel 1, no. 6 E
050 0 0 Microfilm Slavic 6699 TP

Enter the call number of the original in the first field 050. Use 1st indicator value blank or 1 and 2nd indicator value 0. Enter the microform shelf number in the second 050 field, 1st and 2nd indicator value 0.

050 1 0 BJ1533.C4 ‡b C49
050 0 0 Microfilm 28350 BJ

University Microfilms dissertations, 1940-1961. From 1940 to 1961, dissertations from University Microfilms in the National Union Catalog had the following style of call number:

Microfilm AC-1 no. 20,889

If you are transcribing such copy, enter the call number in subfield ‡a with spaces between each element.

050 0 0 Microfilm AC-1 no. 20,889
REC shelf numbers

In LC-created records created prior to 1992 may have a 050 with a suggested class number and 1st indicator value blank or 1 because sound recordings are not shelved by class number at LC. Records for sound recordings may carry field 050 with a shelving or other location device used by LC instead of a classification number.

Serial shelf numbers

If some issues of the serial have appeared in one or more series over a period of time, each with a different call number, the field is repeated for each call number involved.

Do not enter IN PROCESS or minimal-level cataloging numbers (e.g., MLCM 81/3002 (B), WMLC L82/1234) in subfield ‡a.

Entering call numbers in 050 and 090

Fields 050 and 090 print for institutions profiled for LC or NLM call numbers. The print program recognizes and parses LC call numbers in terms of predefined elements. The print program parses the first 7 elements. An eighth element prints on a new line. Subsequent elements are free form. The following table lists the first 10 predefined elements (a = alpha, n = numeric, x = alpha or numeric character).

The definitions of these elements remain constant, even if a call number lacks an element. For example, the first Cutter number is element 5 even if the call number has no date preceding the first Cutter number.

1 Alphabetic portion of class number (aaa) DR M JX PS HF KF Q
2 Whole number portion of class number (nnnn) 340 211 33 3523 5414 4558 11
3 Decimal number portion of class number (.nnn) .3       .13    
4 Date or other number (nnnn or nxxx)           15th  
5 Decimal point and first Cutter number (.annn) .N4 .J476 .A5 .O46 .R73 .G6 .P6
6 Date or other number following first Cutter number (nnnn or nxxx)     1968   1978    
7 Second Cutter number (annn) A313   I31 A12      
8 8th element of call number 1969 K.258         n.s.
9 9th element of call number   E8         vol. 55
10 10th element of call number. Any succeeding elements of call numbers   1970         pt. 5
Entering call numbers

Use the following guidelines to enter LC call numbers in field 050 and field 090:

  • Enter one space before a delimiter, after a subfield code, and before a date or volume number. Do not enter any other spaces, except as described in the these guidelines.
  • Enter alphabetic and numeric portions of the class number (elements 1, 2, and 3) in subfield ‡a. Do not enter intervening spaces.
    050     F2161 ‡b .B63
    050     DD259.4 ‡b .B527 1973
  • Enter one space before a date or other number following the class number (element 4) in subfield ‡a.
    050     DK274.3 1968 ‡b .K39
    050     KF4558 15th ‡b .G6 1974
    050     BX830 1962.A45 ‡b P792 1972
  • If the date or other number is part of the classification number (element 4) and there is no following information, enter the date in the subfield ‡b.
    050     ES275 ‡b 1962
    050     ES525.5 ‡b 105th
  • If the call number has only one Cutter number, enter the decimal point and Cutter number (element 5) in subfield ‡b.
    050     JX1947.7 ‡b .M5
    050     DD259.4 ‡b .B527 1973
    050     DK274.3 1968 ‡b .K39
    050     KF4558 15th ‡b .G6 1974
    050     JX1977 ‡b .A2 ST/SOA/40
    050     VM341 ‡b .M9 vol. 48
  • However, if the call number begins with CS71, enter the Cutter number in subfield ‡a and the date in subfield ‡b.
    050     CS71.S889 ‡b 1968
  • If the call number has two Cutter numbers, enter the first (element 5) in subfield ‡a and the second (element 7) in subfield ‡b.
    050     PQ4734.V5 ‡b Z59
    050     VA65.B54 ‡b B52 1972
    050     Z673.L7 ‡b You
    050     HF5549.5.R44 ‡b M35
    050     BX830 1962.A45 ‡b P792 1972
  • If a date intervenes between two Cutter numbers, enter a decimal point before both Cutter numbers.
    050     JX233.A5 1968 ‡b .B3
  • To print a decimal point before the second Cutter enter the first Cutter number, the intervening date, and the second Cutter number in subfield ‡b. The decimal point preceding the second Cutter number does not print if the second Cutter number is the first element in subfield ‡b.
    050     JX233 ‡b .A5 1968 .B3
  • Enter one space after the second Cutter (element 7).
    050     VA65.B54 ‡b B52 1972
    050     BX830 1962.A45 ‡b P792 1972
  • Treat the term subser or Suppl. as part of the item number. Enter a space between the term and the item number. If the call number has no item number, enter subser or Suppl. in subfield ‡b. Enter subser with lowercase letters. Use an uppercase S in Suppl.
  • Enter a comma and a space after element 8 and each succeeding element to indicate a line break. The comma does not print. It indicates that a new line should begin.
  • Characters to print on one line must not exceed the margin size on OCLC printed cards, which is two characters fewer than the first indention. If the first indention is 10, the maximum number of characters per line is 8.
    050     JK1369.43 ‡b .P65 1974 n.s., v.2
    050     Q11 ‡b .P6 n.s. vol. 55 pt. 5
    050     DT333 ‡b .S34 47. Jahrg., Heft, Nr. 8
    050     AS182 ‡b .H44 1967 Abh.1, T.3
  • Multiple call numbers.

    Certain classification choices are recognized to be local decisions. For example, if one user has chosen to class together a monographic series and another library classes it separately, multiple call numbers in the master record may be appropriate. Multiple call numbers are allowed in these circumstances:

    • Classed together number vs. classed separately number for monographic series
    • Literature number vs. PZ number for fiction
    • Bibliography number vs. subject number
    • LC minimal number vs. member call number
    • Geographic classification number vs. subject classification number for maps and atlases

1st Indicator

Existence in LC collection. Whether the item is in LC's collections.

 
blank character

No information provided

 
0

Item is in LC. From LC copy only.

 
1

Item is not in LC. Also used by LC for items not shelved by classification number (i.e., sound recordings)

Note: Transcribing LC copy. If you are transcribing LC copy, assume that the item is held by LC and use indicator 0. If one of the following conditions exists, assume the item is not held by LC, follow the suggested practice, and use indicator blank or 1:

  • If the call number is enclosed in brackets, [HF314.V52U54], do not enter the brackets.
    050 1   HF314.V52 ‡b U54
  • If the call number is preceded by a Maltese cross ( maltese cross ) and is enclosed in parentheses ( maltese crossDA112.G82 ) do not enter the parentheses or the Maltese cross.
    050 1   DA112 ‡b .G82
  • If a class number alone is enclosed in brackets [QL336], do not enter the brackets.
    050 1   QL336

2nd Indicator

Source of call number. The source of the classification/call number.

 
blank character

No information provided

 
0

Assigned by LC. From LC copy only.

 
4 Assigned by agency other than LC

Note: Transcribing LC copy. LC prints alternative class numbers in brackets below the complete call number. If you are transcribing such copy, enter each alternative class number in separate subfield ‡a's following the item number (subfield ‡b) of the complete call number. Do not enter the brackets.

Call number Enter
PZ3.S6737 Las [PR5037.N58] 050 00 PZ3.S6737 ‡b Las ‡a PR5037.N58
M2.R2384 [M5] [M11] [M140] [M178] 050 00 M2 ‡b .R2384 ‡a M5 ‡a M11 ‡a M140 ‡a M178

If you use such a call number for card production, only the complete call number (first subfield ‡a and subfield ‡b) prints.

If you prefer the alternative class number, enter the class number and an item number in field 090. Or, delete the unwanted call number from field 050 and add an item number to the alternative class number.

Subfields

 
‡a Classification number

The class number portion of the call number.

050 0 0 HE310.C45 ‡b R68 2010
100 1   Rothstein, Jason, ‡e author.
245 1 0 Carless in Chicago / ‡c Jason Rothstein.
264   1 Chicago : ‡b Lake Claremont Press, ‡c [2010]
650   0 Urban transportation ‡z Illinois ‡z Chicago ‡v Guidebooks.
[HE corresponds to Transportation and communications; 310 corresponds to Urban transportation, By region or country, United States, By city or metropolitan area, A-Z; C45 corresponds to Chicago; R68 is a Cutter representing Rothstein, Jason; and 2010 corresponds to the date of publication]
‡b Item number

The item number portion of the call number.

050 0 0 LB1028.3 ‡b .B357 2012
100 1   Bain, Alan, ‡d 1957- ‡e author.
245 1 4 The learning edge : ‡b what technology can do to educate all children / ‡c Alan Bain, Mark E. Weston ; foreword by John Hattie.
264   1 New York : ‡b Teachers College Press, ‡c [2012]
650   0 Educational technology.
[LB corresponds to Theory and practice of education; 1028.3 corresponds to Technology/Educational technology; B357 is a Cutter representing Bain, Alan, 1957- ; and 2012 corresponds to the date of publication]
‡3 Materials specified

A subset of the described material. Determine placement according to use.

050 0 0 CLASSED SEPARATELY ‡3 v. 79-
050 0
0 JX1295 ‡b .U4 ‡3 v. 1-78
245 0
0 International law studies / ‡c Naval War College.
650   0 International law.

Indexing

For indexing and searching information, see Searching WorldCat Indexes, field 050.

Printing

The print program parses elements 1-7, identifying elements and determining where to print them in relation to preceding and following elements (e.g., on the same line or on a new line). Your profile determines line breaks and the printing of decimal points before Cutter numbers.

If an eighth element is present, the print program prints it on a new line. Subsequent elements are free-format elements. The print program does not format these elements for printing. You must enter a comma and a space in the field to indicate each line break. The comma does not print. It shows where a new line should begin. Use the following examples as guidelines:

Displayed in record Prints as
Q11 ‡b .P6 n.s., vol.55, pt.5 Q
11
.P6
n.s.
vol. 55
pt. 5
HV71 ‡b .P5 v.5,7,9 HV
71
.P5
v.5,7,9
HV71 ‡b .P5 v.5, 7, 9 HV
71
.P5
v.5
7
9

If one or more lowercase letters follow either the first or second Cutter number or final date with no intervening space, the letters print on the same line. Use the following examples as guidelines:

Displayed in record Prints as
QA74.L7 ‡b B22a QA
74
.L7
B22a
QA74.L7 ‡b B22a 1974 QA
74
.L7
B22a
1974
QA74.L7 ‡b B22 1974x QA
74
.L7
B22
1974x
LA222 ‡b .B87a LA
222
.B87a
LA222 ‡b .B87a 1974 LA
222
.B87a
1974
LA631 ‡b .G66ab LA
631
.G66ab

If the second Cutter number is a single letter, the print program recognizes that letter as a Cutter number and prints it on a new line. Enter the call number with the subfield ‡b between the two Cutters.

Displayed in record Prints as
PZ3.S18 ‡b V PZ3
.S18
V

If the print program cannot automatically format a call number correctly or if a call number does not fit the pattern of 1-7 elements plus free-format elements, enter all elements as free-format elements. Use a comma-space to designate line breaks for each element in subfield ‡b. Do not enter a decimal before the first element in subfield ‡b. Use the following examples as guidelines:

Displayed in record Prints as
LA222 ‡b  B87a 1974 LA
222
B87a
1974
LA222.B87 ‡b  1969-70, vol. 1-2 LA
222
.B87
1969-70
vol. 1-2
GV182.2 ‡b  U58No, 1946 GV
182.2
U58No
1946
M1012.S357 ‡b  Op.42 C57 1957
or
M1012 ‡b  .S357 Op.42 C57 1957
M
1012
.S357
Op.42
C57
1957

M7405.J476 ‡b  K.258, .E8,1970
or
M7405 ‡b  .J476 K.258, .E8, 1970

M
7405
.J476
K.258
.E8
1970

TH16.T15 ‡b  E6 A5, 1974
or
TH16.T15E6 ‡b  A5, 1974

TH
16
.T15
E6
A5
1974
LA222 ‡b  B87a, 1974 LA
222
B87a
1974

M211.M94 ‡b  K.213, .H5
or
M211 ‡b  .M94 K.213, .H5

M
211
.M94
K.213
.H5

See field 090 for more information.

Printing problems

If the call number has second or subsequent lines that exceed your profiled margin size (two characters fewer than the first indention), the print program produces unit (zc) cards.

Furthermore, the print program cannot format certain LC call numbers for printing. If you are having printing problems, check the following characteristics of the numbers you are entering:

  • The call number field lacks a Cutter number (i.e., no elements follow the class letters and class numbers).
  • A nonalphabetic or nonnumeric character (e.g., *) is the first character in an element.
  • The call number has unusual punctuation or unusual combinations of numeric and alphabetic characters.
Printing nine or more characters

To produce cards for call numbers that have nine or more characters (e.g., translations), shorten the number. If your shelf arrangement does not require a specific item number, enter one space or a comma-space to break the item number into two lines. If your shelf arrangement requires a specific item number, use field 099.

LC copy number Edited number Prints as
BF431 ‡b .P4827713 BF431 ‡b .P482 7713 BF
431
.P482
7713
Printing unusual numbers

The following examples cause unit (zc) cards or are formatted incorrectly on cards. Use field 099 to produce cards with such call numbers.

E116.2 ‡b .E 1893
E525.5 ‡b .103th
HF5414.13
HJ86E ‡b .Z285
LD4191.07 ‡b T38
QC721 ‡b .B
Z115Z.M45 ‡b V7
Map and atlas call numbers

Use the following guidelines to enter and print LC map and atlas call numbers in field 050 and field 090:

Maps. LC places the item Cutter in subfield ‡b. The item Cutter is always the final element in an LC map call number.

Atlases. LC places the item Cutter in subfield ‡b. However this is not the final element. The item Cutter is always followed by the date of publication of the atlas.

You should follow LC practice when entering map and atlas call numbers. However you must edit some map and atlas call numbers to print them correctly. The following examples of hypothetical map and atlas call numbers show how to enter the call number in field 050 or field 090 and how to edit the field for card production. Alternatively you may repeat the call number in field 099 for card production.

Entered as Edit for card production Prints as
G3804.N4 year ‡b .F4 G3804.N4 ‡b year .F4
or
G3804.N4 ‡b year, .F4
G
3804
.N4
year
.F4
G3804.N4 1974 ‡b .F4 G3804 ‡b .N4 1974 .F4 G
3804
.N4
1974
.F4
G3804.N4 s20 ‡b .F4 G3804.N4 ‡b s20,.F4 G
3804
.N4
s20
.F4
G3804.N4 svar ‡b .F4 G3804.N4 ‡b svar .F4
or
G3804.N4 ‡b svar, .F4
G
3804
.N4
svar
.F4
G3804.N4P2 1974 ‡b .F4 G3804.N4 ‡b .P2 1974, .F4 G
3804
.N4
P2
1974
.F4
G3828.A4E4 1962 ‡b .T5 G3828.A4 ‡b E4 1962, .T5 G
3828
.A4
E4
1962
.T5
G1417.W54P53 ‡b N3 1981 G1417.W54 ‡b P53 N3,1981G G
1417
.W54
P53
N3
1981
G3804.N4P2 svar ‡b .F4 G3804.N4P2 ‡b svar, .F4 G
3804
.N4
P2
svar
.F4

Map call numbers that contain a colon (e.g., G6713.F7:3G6P2 1976 ‡b .L5) cause zc cards. To produce cards with such call numbers, repeat the call number in field 099.

Map call numbers in records distributed from LC may contain two spaces at the end of subfield ‡a. You should enter only one space at the end of subfield ‡a.

See LC's Class G schedule for more information.

This page last revised: December 9, 2014