A water-insoluble alcohol that occurs in plant oils (especially wheat germ oil), egg yolks, and liver, and is also produced synthetically. Alpha-tocopherol is the principal form of vitamin E in the body. Chemical formula: C 29 H 50 O 2. See more at vitamin E.
âInputâ is also easy-something put into a system. So in the technology world... An input device is any tool that feeds data into a computer. For example, a keyboard is an input device, whereas a display monitor is an output device. Mice, trackballs, and light pens are all input devices.
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.