Create a new Package in Pharo Smalltalk

In the Class browser, action-click (in Windows, right-click) on the Packages pane (the left-most pane).

The browser automatically generates the code to create the new sub-class of object, with the 'category' set to the Package name.

Packages should have a two or three letter abbreviation at the start of their name.

(Categories and packages are not entirely the same thing:  categories have existed at least since the dawn of Smalltalk-80, and are simply a collections of related classes in a Smalltalk image. A package is a collection of related classes and extension methods that may be versioned using the Monticello versioning tool.)