First and Second indicators:

#  Undefined


a  Make and model of machine (NR)

b  Programming language (NR)  [Not used]

c  Operating system (NR)

0  Authority record control number or standard number (R)

2  Source of term (NR)

6  Linkage (NR)

8  Field link and sequence number (R)

NOTE:  See MARC 21 Format for Bibliographic Data (753 System Details Access to Computer Files) for code definitions not given below.


Field 753 is used to access records via the type of computer and/or operating system used with a computer file serial and its accompanying material.  This kind of added entry is also assigned to facilitate the capability of selecting and arranging records for production of printed indexes.

Editing instructions

Do not input a period at the end of the field unless the field ends with data that ends with a mark of punctuation.


$a  Make and model of machine.

Input in subfield $a the make and model of the hardware on which the computer file is operated.

753 ## Apple II

$c  Operating system.

Input the name of the operating system in subfield $c.

753 ## IBM PC $c DOS

753 ## Macintosh II $c System 6.0.7 or higher

$6  Linkage.

For instructions on the use of subfield $6, see field 880.

Related fields, etc.


753 System Details Access to Computer Files  (MARC 21 Format for Bibliographic Data)

See also:

700-75X  Added Entry Fields

Variable Data Fields

Section E.  MARC 21 Format for Serials as Applied Within CONSER

CONSER Editing Guide:  Contents