Version control is the practice of managing and sharing changes to documents, programming code, websites, or any other files to keep track of what’s been changed, by whom, when, and why. All previous versions of files are saved, and you can even revert to a previous version. Git-portal sites, like GitHub or GitLab, offer many useful features to facilitate collaborative development. This is a two-part series. In this beginner-level first session, we will show you how to create a repository, record changes to files, explore and restore from the recorded history, and resolve conflicts (when one member overwrites another’s changes).