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Will I be charged a license fee for Open Source Software?

Can I use Open Source software for commercial purposes?

What does a “permissive” Open Source license mean?

Is “copyleft” the same as “open source”? What is “copyleft”?

Is “free software” the same as “open source”?

How does a software license work?

Do I need multiple software licenses for multiple users?

Do I really need a software license?

What happens if I don’t have a software license?

Can I call my program “Open Source” even if I don’t use an approved license?