functions, m for menus, and d for dialogs. See also Psion Organiser Symbian References External links The opl-dev project OPL wiki on Internet Archive containing documents detailing OPL keywords, OPX interfaces and much other information OPL Blog by Symbian, now dead, but old versions are available from the Internet Archive Russian site about OPL OPL programming tutorial Embedded systems Free mobile software Symbian OS Procedural programming languages BASIC programming language family Software using the LGPL license Computer-related introductions in 1984