Functionality can be extended by add-on programs called plugins (or plug-ins) found on the official forums.

And it runs most of the 10,000 add-on programs available for the Palm, including drawing programs, spreadsheets, games, databases, electronic books and so on.

The ext2 file system has an add-on program called e2undel which allows file undeletion.

Furthermore, the Palm operating system can run a vast library of add-on programs - everything from databases to games and tip calculators.

A nice little niche market has evolved for memory-resident add-on programs designed to solve this problem.

NT supports basic terminal requirements through add-on programs and combinations of hardware and software.

For example, only the Palm can run any of 15,000 add-on programs (games, databases and so on).

LocoScript was designed to accommodate add-on programs, which could be selected via the file manager.

Until 1992, grammar checkers were sold as add-on programs.

Goodbinder Imaginary's functionality can be extended by add-on programs known in the .