Welcome to Pharo. ��

There are a number of different types of memory so it's difficult to answer your question.��

The first big divide is Development vs Production. ��in Development you create code that is stored in a repository.�� Your changes can also be captured in a change set, or automatically in the changes file.�� When you create a new class it creates a change which will go to the changes file. �� You can get back your code by selecting World > Tools... > Recover lost changes. See��http://files.pharo.org/books-pdfs/updated-pharo-by-example/2017-01-14-UpdatedPharoByExample.pdf.�� It may also add your code to a change set.�� See "Change sets and the change sorter" in the same link.�� You might also save code in a Monticello Repository, or even have your files written into a Git repository. ��

Once you have your code written and saved in a repository you can create a production image for your users.�� That process usually requires that you use a base image, load your changes and save the image.�� It might also include locking down the image, turning off developer tools, and packaging it in an installer.�� At that point, you can send your classes and methods to others to use as an application.�� You could also deploy your Pharo image as a server on your computer and allow users to interact with it using other methods like http��or tcp. ��

There is a third method to save modifications in memory during runtime.�� The basic way to do that is to just create instances from your classes (MyClass new) add your data and execute your methods and save the image, or write out the data to a database or file so that those instances can later be read in and recreated by your program.�� In that way, your program saves its state and can reload it later in memory.

It's not clear from your question what type of memory or program you are talking about.�� Good luck with your programming, hopefully, that will be helpful! ��

All the best,

Ron Teitelbaum��