O.a Past Paper
1. Write the uses of each, shredder, computer, fax machine, printer, digital camera, photo copier. A. Shredder - a device that shreds documents (usually in order to prevent the wrong people from reading them)
B. A computer is an electronic device that manipulates information, or "data." It has the ability to store, retrieve, and processdata. You can use a computer to type documents, send email, and browse the internet. You can also use it to handle spreadsheets, accounting, database management, presentations, games, and more.
C. Short for facsimile machine, a device that can send or receive pictures and text over a telephone line. Fax machines work by digitizing an image -- dividing it into a grid of dots. Each dot is either on or off, depending on whether it is black or white. Electronically, each dot is represented by a bit that has a value of either 0 (off) or 1 (on). In this way, the fax machine translates a picture into a series of zeros and ones (called a bit map) that can be transmitted like normal computer data. On the receiving side, a fax machine reads the incoming data, translates the zeros and ones back into dots, and reprints the picture.
D. A printer is a device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard size sheets of paper.
E. Digital camera records and stores photographic images in digital form. Many current models are also able to capture sound or video, in addition to still images. Capture is usually accomplished by use of a photosensor, using a charged coupled device (CCD).These stored images can be uploaded to a computer immediately or stored in the camera for to be uploaded into a computer or printer later. Images may also be archived on a photographic compact disc or external hard disk.
F. A photocopier is any electrically operated machine using a photographic method, as the electrostatic process, for making instant copies of written,
B. A computer is an electronic device that manipulates information, or "data." It has the ability to store, retrieve, and processdata. You can use a computer to type documents, send email, and browse the internet. You can also use it to handle spreadsheets, accounting, database management, presentations, games, and more.
C. Short for facsimile machine, a device that can send or receive pictures and text over a telephone line. Fax machines work by digitizing an image -- dividing it into a grid of dots. Each dot is either on or off, depending on whether it is black or white. Electronically, each dot is represented by a bit that has a value of either 0 (off) or 1 (on). In this way, the fax machine translates a picture into a series of zeros and ones (called a bit map) that can be transmitted like normal computer data. On the receiving side, a fax machine reads the incoming data, translates the zeros and ones back into dots, and reprints the picture.
D. A printer is a device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard size sheets of paper.
E. Digital camera records and stores photographic images in digital form. Many current models are also able to capture sound or video, in addition to still images. Capture is usually accomplished by use of a photosensor, using a charged coupled device (CCD).These stored images can be uploaded to a computer immediately or stored in the camera for to be uploaded into a computer or printer later. Images may also be archived on a photographic compact disc or external hard disk.
F. A photocopier is any electrically operated machine using a photographic method, as the electrostatic process, for making instant copies of written,