ls of abstraction which make up a graphical user interface. The Power of GUIs For much of their history, computers have been capable of presenting only textual and numeric data to users. Users reciprocated by specifying commands and data to computers in the form of text and numbers, which were usually typed into a keyboard. This method of interaction with computers was only adequate at best.
W. Keith Edwards, Elizabeth D. Mynatt, Kathryn Sto