Computers receive data by reading it from disk, accepting it electronically over a modem, or receiving input directly from you, the user. You provide your input by way of an input device; the most common input device is the keyboard.
caution
You never want to eat or drink around your computer. Spilling food and beverages on the keyboard can short out its electronic circuits and wreak havoc on your entire system. Soft drink residue can also cause your keys to stick, and a stuck key can actually cause your computer not to start!