Scanners
Scanners facilitate capturing of the information and storing
them in graphic format for displaying back on the graphical screen. Scanner
consists of two components, the first one to illuminate the page so that the
optical image can be captured and the other to convert the optical image into
digital format for storage by computer. The graphic image scanned can now be
seen and processed directly by the computer. Substantial research work is going
on to establish methods by which the scanned image can be automatically
converted into equivalent text for further processing.
Output Devices
Visual Display Unit is the Output device which displays an
image on the screen. Cathode Ray Tube, Liquid Crystal Display, Projection
Displays are examples of Display Devices.
Printers : Printers are used for producing output on paper.
There are variety of printing devices which can be classified according to the
print quality and printing speeds. Dot matrix printers, Inkjet printers, Laser
printers are the example of printers.
Software : Generally, making, the different
types of hardware arranged together, functionable in different ways with the
input of electricity or some other form of energy can be termed as software. The
task of making/developing software is called Programming. Software has two
categories Languages and Packages. Languages are the software that are used to
write programs.
