Administering Corporal Punishment is the only thing cuz!
A memory stick is kind of like an updated floppy. It's something you can save all of your info on, and allow it to be transferred to another computer/other mechanical device.
Anything you have on your computer can be put on a memory stick so long as you have the required space to hold it. I'm waiting for them to make a stick that can be used for the operating system and all the programs you want to install. Just think, having a memory stick with your operating system and all your files in nyour pocket and just plug it into any computer and start doing your thing.