At the FSF, the licensing team is often asked, "What is the difference between an 'aggregate' and other kinds of 'modified versions'?" Read the answer on our GPL FAQ:
Frequently Asked Questions about the GNU Licenses - GNU Project - Free Software Foundation
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Read about the licensing and compliance team's work over the past few months in an article by team member and FSF copyright & licensing associate Craig Topham: https://u.fsf.org/401 #WorkingTogether image