Discovering Computers 2011: Complete by Gary B.(Gary B. Shelly) Shelly, Misty E. Vermaat

By Gary B.(Gary B. Shelly) Shelly, Misty E. Vermaat

Studying pcs 2011; whole, offers scholars with a present and thorough creation to pcs through integrating using know-how with the broadcast textual content.

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For security purposes, some keyboards include a fingerprint reader, which allows you to work with the computer only if your fingerprint is recognized. A mouse is a small handheld device. With the mouse, you control movement of a small symbol on the screen, called the pointer, and you make selections from the screen. A microphone allows you to speak into the computer. A scanner converts printed material (such as text and pictures) into a form the computer can use. A Web cam is a digital video camera that allows you to create movies or take pictures and store them on the computer instead of on tape or film.

Mobile devices, such as many cell phones, often are classified as computers. Computers are a primary means of local and global communication for billions of people. Consumers use computers to correspond with businesses, employees with other employees and customers, students with classmates and teachers, and family members and military personnel with friends and other family members. In addition to sending simple notes, people use computers Figure 1-1 People use all types and sizes of computers in their daily activities.

Consistency: Given the same input and processes, a computer will produce the same results — consistently. A computing phrase — known as garbage in, garbage out — points out that the accuracy of a computer’s output depends on the accuracy of the input. For example, if you do not use the flash on a digital camera when indoors, the resulting pictures that are displayed on the computer screen may be unusable because they are too dark. • Storage: A computer can transfer data quickly from storage to memory, process it, and then store it again for future use.

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