This installment of The Mac Observer's "AppleScript: The Macintosh Autopilot" series covers AppleScript subroutines. Subroutines, sometime referred to as handlers, allow scripters to break their scripts down into manageable chunks of code and then reuse those chunks by sending values to them.
It's based on the original simplicity.1 theme with improved user control over font size and a narrower format with increased interline spacing for better readability.