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Terminals
The terminal is a popular input/output device. Terminals are used for two-way communications with the CPU or with other terminals a few feet or thousands of miles away. With the aid of a terminal, a user can access computers around the world.
Terminals, also called workstations, allow to interact with a computer. It is required to use a keyboard to enter data and receive output displayed on a cathode ray tube (CRT) display screen, or monitor. Because data must be keyed into these devices one character at a time, the possibility of error is high and the data transmission rate very low, thus, limiting the use of these terminals to small-volume input and inquiries.

Source: Computer Basics, উন্মুক্ত বিশ্ববিদ্যালয়।