INTERNET

                  INTERNET




The INTERNET CONSISTS OF TENS thousands of computer network linked together to form one huge global network, are loving any computers on one network communicate with any computer on another. The two main service used on the Internet are email and the World Wide Web Email allow text message to be sent - along with attached computer files, images, videos clips, for example - to other computer on the Internet . The Web consists of millions of pages made up of digital files that are store on computer across the world and can be viewed using a Web browser . The Web also provides interactive access to various services, for example banking and shopping.

INKJET PRINTER

                       Inkjet Printer 



INKJET PRINTER EXPEL ink droplets from hundreds of tiny jets, or nozzles,  onto a medium, such a paper, to printer and image. each droplet corresponds to a single pixel ( Picture element).  Black-and-white  printers use only black ink, while colour printer over print combinations of a printing colours (cyan,magenta, yellow and black) to create a full colour range. the printhead containing the nozzle moves sideway across the paper, creating a line of pixel, before the paper moves slightly forward  show the next line  can be printed. Two basic methods are used to  eject ink : thermal,  in which ink is  heated to form an  expanding bubble that expels a droplet from the nozzle ,and piezoelectric, in which an electric current expands a crystal causing it to push out the ink droplet . The printer show here can print Digital Photographs directly from a memory card.

TABLE COMPUTER

                     TABLE  COMPUTER


By The Early 1990s electronics circuitry had been miniaturized to such an extent that it was possible to make small handheld computing devices.

                 The first of these was the Personal Digital Assistant (PDA), which offered future including an address book, calendar and notepad. In recent year, PDAs have been overtaken by smartphone with Internet and email access. Related product is the ebook reader, we store books in the digital form of users "electronic papers" to mimic the appearance of ink on real paper. An e-book reader no bigger than you thin paperback can store several thousand digital books in its memory. The most reset handheld computing device is the tablet computer. This looks like a thing flat display, but it is actually a complete computer.

                       Tablet computers are typically controlled by a touch-sensitive screen and have a wireless link to other computers and the Internet. They run software application or apps downloaded from the internet. The most popular tablet computer currently is the Apple iPad. It has a multi touch interface that enables its screen to detect the movement of finger tips.

              As well as selecting options and apps by touching the screen, images can be enlarged or shrunk by moving fingertips apart or together on the screen.

PERSONAL COMPUTER

  

               

     PERSONAL COMPUTER

       

               Personal Computers (PCs) falls into two main types IBM comfortable PCs, known simply as PCs, and Apple Macintosh PC's known as "Macs". Date difference in the way files and programs,and the user access to them,are organized, and programs must be tailored for each type .However, in in most other respect PC's and Macs have much in common. Both Contain micro chips, or Integrated circuit, that store and process data. The "brain" of any PC is a chip known as central Processing Unit(CPU), which perform mathematical operation in order to run program instruction and receive , Store, and output data.

           The most powerful personal computer CPUs   today can perform more than a billion calculation a second. Data can be a input via CDs,USB memory sticks and other storage media. Highly portable Laptops and network PCs are also in widespread use. Most PCs are able to communicate with many other devices, including digital cameras and Smartphones.