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I still remember when the computers entered to our Department during the early 90s, the local computer technician used to install Windows operating system as and when required and used to charge an amount of Rs 250 per installation. He was dare enough to give a bill with description that “installation of Windows” The OS CD supplied along with computer was somewhere in the cupboard and we were not aware of the CD supplied was a licensed version. The guy always used the pirated CD!
One of the DOS program which was the main program used then was opening in the directory in which it was installed and not opening in any other directory we wanted. Then we had to beg him for the remedy. He was doing something to make that DOS software functioning in any directory.