IBM Smalltalk User's Guide
An image is a Smalltalk executable file that provides a
development environment on your workstation. An image holds the
following:
- Classes that define the VisualAge or IBM Smalltalk product, and instances
of these classes
- Compiled code for all executable methods
- Data for all variables defined in the product, including all instance data

Thus, an image holds components that provide the interface and functions
for the product. Plus, it holds software components that you create or
copy from an outside source.
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