Many people think that DOS is outdated, but I don't think so. You can do many things with DOS,and even Eric Wilhelm uses it! (See here
) Some of the things you can do with DOS include giving yourself access to important files (good for hacking), deleting things, backing up things, showing all the files and folders in a folder, making simple but harmful viruses, and reformatting hard drives (!!). Unfortunately, when you want to run a program you made, you must type in the location if you want other information to be passed on to it. This instructable will teach you how to essentially make a command so you don't have to do this.