“WAS” is a time machine for documents. The main reason of creating this is to solve my own problems. When I was coding git helped me to go back in code’s time and saved me from future mistakes. Inspiring from this I want same feature for documents too. I created it to solve my own study documents problem. Imaginary Example: In organic chemistry there are many different equations for same product. Here, WAS will help me to go back to any easier equation I wrote previously before writing the complex/ error equation.