Extension commands are IBM SPSS Statistics commands that are implemented in the Python, R, or Java programming language. They allow users who are proficient in Python, R, or Java to share external functions with users of standard IBM SPSS Statistics command syntax. Extension bundles package custom components, such as custom dialogs and extension commands, so that they can be easily installed.

Provides a catalogue of extension bundles authored by IBM SPSS and available from the IBM SPSS Statistics Extension Commands collection. Most of the extension bundles listed in this article contain an extension command and an accompanying dialog box that generates command syntax for the extension command in the same manner as built-in dialogs.