examples of telephones 
The shape and function of telephones is constantly evolving; today’s phones relay computer data as well as voice communication.
Equipment made up of a keyboard and a visual display unit that is used to transmit data over a telephone network.
Contains a group of keys that correspond to characters and functions.
Keys corresponding to letters, numbers, symbols and functions that are used to generate characters or control operations.
Buttons used especially to establish and interrupt communication.
Keys corresponding to numbers, mathematical operators and functions that are placed in a specific order to speed up numeric data entry.
Buttons that control the terminal’s main operations, including send, delete and return.
visual display unit
Liquid crystal display screen on which graphics or text data are displayed.