Basic HTML version of Foils prepared Sept 20 97

Foil 7 Perl Modules -- Packages - II

From Perl5 and Advanced Perl4 Features Computational Science for Information Age Course CPS616 -- Sept 20 97. by Geoffrey C. Fox,Nancy McCracken,Tom Scavo
Modules are packages used as libraries
To reference package HTML::FormatPS
Typically you define a file called
FormatPS.pm -- note .pm NOT .pl -- in directory HTML
Note use of UNIX directory structure and file names to support logical object structure of software -- we saw this quaint (but universal) convention when discussing Java

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