OPL's procedure-based code has special commands to create menus and dialogs, or handle files in a flexible way. Its structure is similar enough to BASIC to be easy to use for both beginners and more experienced programmers.
(Professionals can choose to program the Series 3a using a PC-based environment, either in OPL, or in C. Please see the Developer's Reference section for details about Psion's Software Development Kits.)
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