The most fundamental task on a computer is file modification. It is done in writing letters, writing books, creating web pages, writing documentation, programming software, drawing graphics, generating spreadsheets, working with digital imagery, and any other growing number of tasks being made possible on modern computers. The problem is there is no way to keep track of changes made to all these important files. Tracking changes to files can be beneficial and even a necessity to tasks that require backing up older versions, undoing previous changes, or documenting the changes of a file.