We had DOS based terminals in our college computer lab. Each of us had a different working directory, but the directories were all accessible by each other. Onc

We had DOS based terminals in our college computer lab. Each of us had a different working directory, but the directories were all accessible by each other. Once I and my friend opened a directory of a girl student and created a batch file named "cd.bat" which prints some garbage texts on the screen. Whenever she runs "cd" command from her working directory, this batch file would get executed!