When the Greek philosopher Heraclitus pronounced his famous "πάντα ῥεῖ" (everything flows), he most probably was not thinking about software. But it applies to software as much as to other aspects of life: software is in perpetual change, being modified to remove bugs, add features, and adapt it to changing environments. The management of change is now a well-established part of software engineering, with the most emblematic tool being version control. If you are developing software...
