A type of electronic display that senses physical touch by a person’s hands or fingers, or by a device such as a stylus, and then performs actions based on the location of the touch as well as the number of touches. A touchscreen display is useful for interacting directly with a computer or electronic device, partially or even completely eliminating the need for intermediate input devices such as computer mice, trackpads or keyboards.
Touchscreen, or touch screen, support by mobile operating systems like Apple’s iOS have made touchscreens pervasive on smartphones and tablet devices, and they’re also becoming more popular on laptops and even desktop computers. Microsoft Windows 7 employs Windows Touch, and Windows 8 is expected to be designed from the ground up with touchscreens in mind. Apple’s Mac OS X has offered touchscreen support for quite some time, and the new Mac OS X Lion release provides enhanced support for multi-touch gestures and animations.
- tower model
)Refers to a computer in which the power supply, motherboard, and mass storage devices are stacked on top of each other in a cabinet. This is in contrast to desktop models, in which these components are housed in a more compact box. The main advantage of tower models is that there are fewer space constraints, […]
- trace cache
(trās kash) (n.) An instruction cache in a microprocessor that stores dynamic instruction sequences after they have been fetched and executed in order to follow the instructions at subsequent times without needing to return to the regular cache or the memory for the same instruction sequence. An advantage of the trace cache is it reduces […]
(trās´rowt) (n.) A utility that traces a packet from your computer to an Internet host, showing how many hops the packet requires to reach the host and how long each hop takes. If you’re visiting a Web site and pages are appearing slowly, you can use traceroute to figure out where the longest delays are […]
)A ring on a disk where data can be written. A typical floppy disk has 80 (double-density) or 160 (high-density) tracks. For hard disks, each platter is divided into tracks, and a single track location that cuts through all platters (and both sides of each platter) is called a cylinder. Hard disks have many thousands […]
- track density
Same as TPI. A measurement of how tightly the concentric tracks on a disk are packed.