Labels:book | computer | crt screen | earth | hakham | monitor | person | plant | sidewalk | sky | stairs | table | tv | windowpane OCR: USEI HTERFAC 1 -23 Po inting Device Some mice have three buttons while others have only one or two- -wh y? pointing device such as mouse , trackball, or lightpen helps you manipulate objects and select menu usina options The most popular pointing dev ice the mouse The mouse was developed by Mouse Douglas Engelbart the early 1970s 1 provide an input method more efficient than the keyboard. Englebart's work coincided with efforts to construct graphical l user interfaces. The popularity r of the mouse and graphical user interfaces slowly until Apple Computer, Inc. produced the Macintosh computer 1983 Now virtually every computer equipped with mouse When Tou move the mouse on your desk, pointer -usually shaped like an arrow- moves on the screen that corresponds to how you move the mouse You se ...
