Handheld Computers

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    Handheld computers:

                                               A handheld computers is a small, lightweight computer that easily fit in the hand. Many handheld computers communicate wireless with other devices or computers. Some have small keyboards and other have a touch screen and also include a stylus for input. Many handheld computers are used by mobile employees such as parcel delivery people or warehouse employees to take inventory and check supplies etc.

            Handheld computer is not very powerful and cannot perform many tasks that can be performed by desktop and notebook computer.

Handheld computers


    Portable Media Player:

                                                       A portable media player is a mobile devices designed to store, organize and play digital media. Digital media includes music, photos and videos. These devices offer camera, access to the internet and variety of application.

             some portable media player is a models have a touch screen or a touch sensitive pad. A touch sensitive pad contain buttons and wheels to be used with a thumb or finger. It can be used to scroll, play music, view photos, watch videos and adjust volume etc. Portable media players usually includes a set of earbuds that are small speakers that rest inside each ear canal. iPod Touch is an example of media player.

Portable Media player


   E Book Reader:

                                      E Book Reader is designed for reading books, magazines and other digital publications. It is also called e reader. An e book is an electronic version of a printed book readable on computers and other mobile devices. E reader device can hold thousands of  e book.

Most e reader have a touch screen and have built in wireless technology to connect to the internet. An on screen keyboard can be used to navigate, search, and highlight the contents. The user can browser an electronic bookstore and download new eBooks quickly via wireless connection.

             Some e readers use e ink technology. It makes screen easy to read and extends battery life for up to two months. The reader can feel the experience of reading a printed book. The screen can easily be read even in bright sunlight. Some  "e-reads"  have LCD screen similar to laptop and tablets. LCD screen can display colors and are used to view magazines and books with colorful photos. However, it is more difficult to read contents in bright sunlight.

E-Book  Reader


    Minicomputers:

                                          Minicomputers is typically larger. ,more powerful and more expensive than personal computer. Minicomputer can serve up to several hundreds connected users at the same time. It can be used in networked environment as server computer. It is also called mid range server. It is normally accessed by users through a personal computer, thin client or a dumb terminal. a device with a monitor and keyboard is called dumb terminal.

              Minicomputers are used by small and  medium sized organization. They provide centralized store of information and computer programs.

  • Minic0omputers

    Examples:

                    Some examples of minicomputers are as follow:

  •  Prime 9955
  • HP 3000
  • AS400
  • VAX 8600




       
                                 :Mainframe computers:


                                                 
                                                                                coming soon.......

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