538 Subfield $a - System details note:

Subfield $a contains the entire text of the note.

Examples:

538 ##$aData in extended ASCII character set.

538 ##$aWritten in FORTRAN H with 1.5K source program statements.

538 ##$aSystem requirements: IBM 360 and 370; 9K bytes of internal memory; OS SVS and OSMVS.

538 ##$aSystem requirements: IBM 2740 terminal with special narrow platen and form feeding features.

538 ##$aDisk characteristics: Disk is single sided, double density, soft sectored.

538 ##$aVHS.

538 ##$aU-Matic.

538 ##$aCompact disc.