One of the main uses of computers is to process and display information. By processing we mean that the information is modified, interpreted, or filtered in some way by the computer. For example, on an online banking website, a customer may request details of all monies paid out from his account in the last month. Here the computer would retrieve the information, filter out any information not relating to payments made in the last month, and then display it in a web page. In some situations, information is processed without being displayed, and at other times, information is obtained directly without being processed. For example, in a banking environment, regular payments may be processed and transferred electronically without any human interaction or display.