HP 1215EA manual GLOSSARY-12

ROM (read-only memory) Memory that contains the basic instructions for the microprocessor. ROM is permanent memory; turning off the computer does not erase it. Since you cannot change or write to ROM, it is referred to as read only.

See microprocessor.

S

scanner A device that creates digital images of printed documents and photographs. Software allows you to save and edit the images on the computer. See digital. See also software.

screen saver A moving picture or pattern that appears on the screen when you stop using your computer for a specified period of time. Originally designed to protect the monitor, screen savers are now used for amusement.

scroll To gradually move information across the screen when a document or Web page is too long or too wide to view all at once. Scroll bars are located along the right side and across the bottom of a window. When scroll arrows are present at the ends of the bars, you know that some information is off the screen. Click on one of the arrows to scroll the information into view.

scroll mouse A mouse with a scroll wheel (between the two mouse buttons) for

automatic scrolling through long documents or Web pages.

search engine A programme, accessed on the Internet, that allows you to search large databases for information, using keywords or phrases. See database.

secure Web site A Web site that encrypts data to protect it from unauthorised use. When you purchase items over the Internet, you are asked to type your name, mailing address, e-mail address, and credit card information on an electronic form. Sending information to a secure Web site is comparable to giving it over the telephone when you order from a catalogue. (But never send your social security number over the Internet. Criminals can steal your identity with your social security number.) See encrypt.

serial port A small connector on the back of the computer (or keyboard) for plugging in a thin cable attached to a serial device, such as a mouse. Serial devices transfer data, one bit at a time, through a data wire. The serial cable has two wires for bi- directional communication (sending and receiving information simultaneously). See digital. See also parallel port.

shareware Software you can try before you buy. After a trial period, usually

30days, the programme un-installs unless you pay for it You can download shareware from the Internet. See software.

shortcut An icon on the Windows desktop that you double-click to launch a programme.

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