User`s guide

Holzgang, David, Understanding PostScript Programming.
Alameda, CA: Sybex, 1988. ISBN 0-89588-566-2.
Karsnitz, John R., Graphic Arts Technology. Albany, NY: Delmar,
1984. ISBN 0-8273-1828-6.
PostScript Language Journal, the PostScript industry newsletter,
West Orange, NJ: Pipeline Associates. ISBN 0891-5873.
Smith, Ross. Learning PostScript: A Visual Approach. Berkeley:
Peachpit Press, 1990. ISBN 0-938151-12-6.
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Appendix E
Computer Literacy E-3