This example can be identified as a record for a computer file by code m in Leader/06.  The record illustrates the use of two special fields for electronic resources:  field 538 (System Details Note) and field 753 (System Details Access to Computer Files).

LDR

* * * * *cmm##22* * * * *#a#4500

001

<control number>

003

<control number identifier>

005

19920401095900.0

008

040  ##  $a<organization code>$c<organization code>

100  1#  $aAshwell, Jonathan D.

245  10  $aBookends extended$h[electronic resource] :$bthe reference management system.

250  ##  $aV2.08.

260  ##  $aBirmingham, Mich. :$bSensible Software,$cc1985.

300  ##  $a2 computer disks ;$c3 1/2-5 1/4 in. +$e1 manual (107 p. ; 23 cm.)

500  ##  $aCopyright and manual by Jonathan D. Ashwell.

500  ##  $aContents of disks are identical.

520  ##  $aDesigned to save, retrieve, and format references, and to print bibliographies.

538  ##  $aSystem requirements: Apple IIe with 80 column card or Apple IIc;128K; ProDOS; printer.

710  2#  $aSensible Software, Inc.

753  ##  $aApple IIe.

753  ##  $aApple IIc.

See also:

Appendix B:  Full Level Record Examples

Appendices