KEY TERMS
I have included several terms that you may find useful to know before browsing through this trouble-shooting guide. These definitions can be found at the
Technology Encyclopedia website, the link is included in the Links section of this blog.
computer: A general-purpose machine that processes data according to a set of instructions that are stored internally either temporarily or permanently. The computer and all equipment attached to it are called hardware. The instructions that tell it what to do are called "software." A set of instructions that perform a particular task is called a "program" or "software program."
digital projector (also known as data projector): A device that projects computer output onto a white or silver fabric screen that is wall, ceiling or tripod mounted. Data projectors typically accept resolutions of 800x600, 1024x768 or 1280x1024 and may also support standard video from a VCR, DVD or cable box. Widely used in classrooms and auditoriums, there are many units that are equally capable for home theater.
input device: A peripheral device that generates input for the computer such as a keyboard, scanner, mouse or digitizer tablet.
output device: Any peripheral that presents output from the computer, such as a screen or printer. Although disks and tapes receive output, they are called "storage devices."
touch screen: A display screen that is sensitive to the touch of a finger or stylus. Widely used on ATM machines, retail point-of-sale terminals, car navigation systems, medical monitors and industrial control panels, the touch screen offers several advantages. It is resistant to harsh environments, and on-screen buttons created by software enable an infinite number of options to be presented to the user without requiring a keyboard. They also accept hand printing, handwriting and graphics. All touch screens "digitize" the point of contact on screen into an X-Y coordinate. They fall into two major categories: active digitizer and passive touch screen.
USB: (Universal Serial Bus) A widely used hardware interface for attaching peripheral devices. There are typically at least two USB ports on laptops and four USB ports on desktop computers. USB ports began to appear on PCs in 1997, and Windows 98 was the first Windows to support it natively. In 1998, the iMac was the first Apple computer to include USB. Within a few years, USB became popular for connecting nearly every external peripheral device, including keyboards, mice, hard and optical disks and printers. USB eventually replaced the PC's serial and parallel ports, which were standard since the PC's introduction in 1981.