Computer Voca.

Can u give me the description of these voca.?



card reader




bar code




2 Answers

  • 6 years ago
    Favorite Answer


    2014-10-01 09:46:54 補充:

    A monitor or a display is an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size.


    Computer speakers, or multimedia speakers, are speakers external to a computer, that disable the lower fidelity built-in speaker. They often have a low-power internal amplifier. The standard audio connection is a 3.5 mm (approximately 1/8 inch) stereo phone connector often color-coded lime green (following the PC 99 standard) for computer sound cards. A few use a RCA connector for input. There are also USB speakers which are powered from the 5 volts at 500 milliamps provided by the USB port, allowing about 2.5 watts of output power. Computer speakers were introduced by Altec Lansing in 1990.


    A card reader is a data input device that reads data from a card-shaped storage medium. The first were punched card readers, which read the paper or cardboard punched cards that were used during the first several decades of the computer industry to store information and programs for computer systems. Modern card readers are electronic devices that can read plastic cards embedded with either a barcode, magnetic strip, computer chip or another storage medium.


    2014-10-01 09:49:52 補充:

    The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to link several billion devices worldwide.

    2014-10-01 09:50:04 補充:

    Electronic mail, most commonly referred to as email or e-mail since ca. 1993, is a method of exchanging digital messages from an author to one or more recipients. Modern email operates across the Internet or other computer networks.

    2014-10-01 09:51:36 補充:

    Facebook (formerly [thefacebook]) is an online social networking service headquartered in Menlo Park, California. Its name comes from a colloquialism for the directory given to students at some American universities.

    2014-10-01 09:52:32 補充:

    A barcode is an optical machine-readable representation of data relating to the object to which it is attached. Originally barcodes systematically represented data by varying the widths and spacings of parallel lines, and may be referred to as linear or one-dimensional (1D).

    2014-10-01 09:52:46 補充:

    An electronic book (variously: e-book, eBook, e-Book, ebook, digital book, or even e-edition) is a book-length publication in digital form, consisting of text, images, or both, readable on computers or other electronic devices.

    2014-10-01 09:53:47 補充:

    apps唔知你要邊種, 你自己搵下你要邊個

    其他果D字係意見度, 因為太長

    Source(s): wikipedia, wikipedia, wikipedia, wikipedia
  • 6 years ago


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