Taxpayers typically do not look at the Internal Revenue Service as a lifesaver. However, if you have lost your tax ID certificate -- also know as your Employer Identification Number (EIN) -- only the IRS can provide a verification letter confirming your number. Typically, businesses need government confirmation of their EIN when opening new accounts with banks and vendors.
Below we discuss the variety of peripheral devices used for computer input and output. Input Devices. Keyboard. The computer keyboard is used to enter text information into the computer, as when you type the contents of a report. The keyboard can also be used to type commands directing the computer to perform certain actions.
The same is true with a computer, although computers are considerably more complex. Anything that provides input to the system is an input device. Anything that allows the system to relay an internal state to something else is an output device. Some devices naturally act as both. For example, your connection to the Internet serves as both an input and an output device.