Rational ClearCase is a tool for software configuration management (SCM). Once it hit the market in early 1990s, it was a revolutionary tool. One of the most remarkable features were dynamic views, which enabled viewing different versions of a product without downloading the files to the developer's computer. Since then, ClearCase powers software development in many large- and medium-size enterprises. However, since IBM purchased Rational in 2003, development of new features slowed down, and the new generation of developers switched to new tools, like Git. Recently, IBM entered into a partnership with HCL, which hopefully will bring about development of new ClearCase features. Let's wait and see...