![Did you know that PROC IML automatically loads certain modules?](https://blogs.sas.com/content/iml/files/2017/01/AdvancedAnalytics-1.png)
In the SAS/IML language, a user-defined function or subroutine is called a module. Modules are used to extend the capability of the SAS/IML language. Usually you need to explicitly load modules before you use them, but there are two cases where PROC IML loads a module automatically. Modules in IMLMLIB