Information:
The 753 tag, System Details Access to Computer
Files, of the MARC 21 bibliographic record contains
information about the type of computer, programming
language, and operating system needed to use a
computer file. Library users cannot browse the
contents of computer files in the same way they can
with books. Therefore, it is important that
library searchers know the kind of computer and
software they will need. Depending on the
software's capabilities, the 753 tag may be used to
generate lists of items in the library for each
type of computer, programming language, or
operating system.
The 753 tag has three subfields, a, b, and c. Enter
the make and model of the computer in subfield a.
Use subfield b for information about the
programming language when it is readily available.
Use subfield c for the operating system.
Indicators
First Undefined
blank Undefined
Second Undefined
blank Undefined
Subfields
a Make and model of machine (NR)
b Programming language (NR)
c Operating system (NR)
Punctuation
There is no mark of punctuation at the end of the
last subfield unless the subfield ends with an
abbreviation or other data that ends with a mark of
punctuation.
There is no punctuation between subfields.
Examples:
753 _aSony PlayStation
753 _aNintendo Game Boy Color
753 _aIBM PC
_bC
_cDOS 3.3
753 _aMicrosoft Windows 8
753 _aApple Mac OS System 7
753 _aMacintosh
_cSystem 7
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