We live in the age of the microcomputer and at a time where marc and more CRT screens are used for online data entry. As terminal prices decline and microcomputers become more popular, entering data directly through the keyboard will become a way of life. The number of applications that rely on direct data entry is too long to list. Two examples are automated teller machines (ATMs) in banking and point of sale (POS) in retailing.
Online data entry makes use of a processor that accepts commands and data from the operator through a keyboard or a device such as a touch sensitive screen or voice input. The input received is analyzed by the processor. It is then accepted or rejected, or further input is requested. The request for input is in the form of a message displayed on the screen or by audio output.
Most keyboards have keys for alphabetic, numeric, as well as special function. CRT screens display 24} 40, or 80 characters simultaneousIy or one line at a time, depending on the application and options offered by the vendor. Care must be taken that the hardware facilitates easy data entry into the system.
There are three major approaches for entering data into the computer: menus, formatted forms, and prompts.
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