The Squeak Image: What's In It and How To Make It Smaller
Last updated at 5:30 am UTC on 23 May 2017
Some folks think the .image file contains only compiled code. In fact, there is much more than that. Since everything in Smalltalk is an object, you'll find there are graphical forms, windows on the screen, menus, and all sorts of other interesting objects. In short, when you start up an image, it contains everything that you were doing when you made the snapshot.
Here's some information on discovering what is in the image:
The Squeak Image
as well as techniques for making smaller images: