New Technology

 Magnetic Disk                              Magnetic disks use magnetic material to store data ' instructions  and information on disks surface. The data on magnetics disks is stored in tracks and sectors. Tracks from circles on the surface of a magnetics disks. Each tracks on a disks is divided  into sectors. Each sector typically stores up to 512 bytes of data. Hard disk is the most widely used magnetics  disks.             Hard disk:                                hard disk is the primary storage devices in a computer to storages the programs and data permanently.it is also known as hard disk drives HDD OR hard disk HD. most personal computers have at least one hard disk drives. Some large scale computer contain hundreds of hard disk.         ...

       plotter                     A plotter is an output devices that is used to print high quality large graphics  in a variety of colors. Plotter are typically used to print engineering drawings graphics machine parts building designs maps and large posters etc. Such large printing  is not possible with printer. Plotter are more expensive than printers.        Types of plotter                              Different types of plotter are as follows: Flatbed plotter Drum plotter                Flatbed plotter                                                                        ...

    non impact printers:                                           A non impact printers prints characters and graphics without striking the paper. Some printers use use to heat and pressure to creates images. The nonimpact printers are faster but more costly than impact printer.  They produce little noise during printer. The   prints quality of non impact printers is better than impact printers.     Types of non impact printers                                                                             Different types of non impact printer as follows;                  Laser printer:       ...

    impact printers:                             impact printer is an output devices. It prints characters symbols and graphics' on a piece of paper by striking a an hammer against an inked ribbon that  physically contacts the paper. Impact printer do not provide  high quality output. It speed is slow It less  expands. there are many types of impact printer there most common forms of impact printers are dot matrix printer daisy wheel printer and line printer.     Dot matrix printer:                                       A matrix printer is an impact printer. A prints characters symbol and graphics when tiny pins on print head strike an inked ribbon. when the ribbon presses against the paper it creates dots that from characters and graphics. The print head on a dot matrix printer ...

 Hight-definition Television                                                                        HDTV is the most advanced types digital television. It provides the resolution up to 1920 1080 pixels. It delivers a much clearer and detailed wide-screen picture than normal television. It display digital output and the user can take still image easily form the video.       Features of Printer:                                          Different features of printer are as follows:           User Friendly:                                 The printer must be user friendly. It means t...

Video Adapters:                             The video adapter is a circuit that board that determines the graphics capabilities of the computer such as: Screen resolutions available  The number of bits used to store color information about each pixel called bits depth The total number of colors that can be used to display images Number of monitors that can be used be connected to the computer  Types of connected that can be used to connect a monitor to the computer       Most video cards also have memory chips known as video RAM or VGAM. It is used to support graphics display. A sufficient amount of video RAM is required to support higher resolutions higher bit depth and a greater number of colors.                     Types of Display Devices:                         ...

Features of Display  Devices:                                                                               Display devices can be distinguished on the basis of the following features: Size and Aspect Ratio:                                                                                  Display screen are measured diagonally form corner to corner. Display Screen are available in various sizes. Desktop computer monitors range form 17 to 30 inches but the large one are available form special purpose. Table screen are between 7 and 10 inches. Most current display are wide screen which means ...

  Difference  between Soft and Hard Copy:                                                                           The difference between input and output device is as follows:    Soft Copy:                        Soft copy is in electronic form. it is easer to modify. it is intangible. it is stored on storage device. its duplicate copies can be produced without any cost.   Hard Copy:                         Hard copy is in printed form. it is difficult to modify.  it is tangible. it is printed on papers. its duplicated copies can be produced with cost.   Types of Output :      Different types of output are as follows: Text    ...

  Biometric Input Devices                                                Biometric is a technology to authenticate the identity of a person by verifying personal character. Biometric devices analyze some biometric identifier and than grant access to a program system or room. A biometric identifier is physiological or behavioral characteristic of a person. voice patterns are some example of biometric identifiers.                                 A biometric device converts a personal characteristic in digital code. This digital code is compared with digital code stored in the computer.                                  A fingerprint reader is the most widely used biometric device. it scans the cures ...

Magnetic ink character recognition:                                                                                                               Magnetic-ink character recognition reader is used to read  text with magnetized ink. it is used by bank industry for check processing. Each check MICR character at the lower-left  edge. These character represents check number bank and account number. RFID Reader:                            RFID stands radio frequency identification. it is a technology that uses radio signals to communication with a tag attached to an object or a person etc. An RFID reader reads information on the tag using ...

  Magnetic-Ink Character Recognition Reader(MUCR)                                                                                               Magnetic- ink character recognition reader is used to read text printed with magnetized ink. it is used bank  industry for check processing.    

optical Readers:                                         Optical readers is a devices that uses a light source to read characters marks and codes. it then converts them into digital can be processed by computer. There are different types of types of  optical readers are available. The common types of readers are as follow: Optical Character Recognition:                                                              Optical character recognition is a technology that reads types written computer printed or handwritten character form ordinary documents. it translates the images into a form that can be recognized by computer .                                ...

Scanners and Reading Devices                                                             Scanners and reads data or information form a source. This source could be a written document a price tag a graphic image or a photograph. A scanning devices reads the data or information and then converts it  into can be processed by the computer.  The types of scanning devices are optical scanner and optical reader.  Optical Scanner                                An optical scanner is also known as scanner. it is a light-sensing input device that reads printed text or image and store them in the computer in digital from. The input can be entered  into the computer quickly and accurately using the scanner.             ...

     Webcams:                              webcams is also called PC video camera. it is a type of digital video camera that can be used the following purposes:    capture video and still images Send emails with video attachments  Make video telephone calls on the internet etc.                                       Webcams are normally placed on the top of the monitor.  Most notebook  computers have built-in webcams can be attached to the computer through USB port or fire Wire port.                                                                              it is normally used t...

  Digital Camera:                                    Digital Camera is an input device that takes pictures and stores them as digital images. Digital cameras store captured images in the camera or on some type of memory card. photos taken with a digital cameras are typically transferred to a computer using a wired or wireless connections. Many digital cameras allow the user to edit the image. the number of digital photos depends on the amount of memory in the cameras. it does not require any film processing. Many smartphone and other mobile device have built-in digital cameras.  Digital still cameras are available in a wide variety of size and capabilities. Today cameras are typically between 5 and 20 megapixels. The quality of digital camera photo depends on its resolutions.   Types of Digital Cameras:                      ...