ir categories.
             Printers have developed from the daisy wheel printer to the thermal printers of today. Other advancement in printers have been the laser printer (Same technology as photocopiers), which is used commonly in offices as it produces very high quality text and graphics. I general the Printer has developed in four areas. It has made improvements in the quality of type, the speed in which it can print, the quality of graphics and the number of fonts now available.
             Monitors a few years ago were usually monochrome, displaying only two colours. E.g. orange and black or green and black. Another type of "Old Style" monitor is a Grey Scale monitor. This type of monitor displays different shades of grey. These monitors are now used in the minority. Most of the Monitor used today are colour monitors, capable of displaying 16 to over one million different colours! There are a number of different types of colour monitor as shown in the table below.
             Video Standard Resolution Simultaneous Colors
             VGA (Video Graphics Array) 640 by 480 16
             SVGA (Super Video Graphics Array) 800 by 600 16
             XGA (Extended Graphics Array) 640 by 480 65,536
             A mouse (Fig 2) is the device that controls the movement of the cursor or pointer on a display screen. The mouse has been around about 40 years. It was invented by Douglas Engelbart of Stanford Research Center in 1963, and pioneered by Xerox in the 1970s. The mouse is one of the great breakthroughs in computer ergonomics because it frees the user to a large extent from using the keyboard. In particular, the mouse is important for graphical user interfaces because you can simply point to options and objects and click a mouse button. Such applications are often called point-and-click programs. A significant advance in the use of the mouse is the cordless mouse. The mouse isn't physically connected to the computer at all. Instead it relys on infrared or radio waves to communicate ...