There are many source control systems in use, but in this chapter, we will only be looking at the three currently most used. They are the following:

• Team Foundation Version Control (TFVC)
• Git
• Subversion

Within Azure DevOps, only TVFC and Git are available. Subversion is a centralized source control system that is created by the Apache Foundation. In the upcoming subsections, we'll take a look at TFVC and Git in more detail and learn how to migrate sources between them. Subversion is discussed at the end of this chapter in the Other tools for source control section.