A type of printer that produces letter-quality type. A daisy-wheel printer works on the same principle as a ball-head typewriter. The daisy wheel is a disk made of plastic or metal on which characters stand out in relief along the outer edge. To print a character, the printer rotates the disk until the desired letter is facing the paper. Then a hammer strikes the disk, forcing the character to hit an ink ribbon, leaving an impression of the character on the paper. You can change the daisy wheel to print different fonts.
Daisy-wheel printers cannot print graphics, and in general they are noisy and slow, printing from 10 to about 75 characters per second. As the price of laser and ink-jet printers has declined, and the quality of dot-matrix printers has improved, daisy-wheel printers have become obsolete.
- dark archive
(n.) In reference to data storage, an archive that cannot be accessed by any users. Access to the data is either limited to a set few individuals or completely restricted to all. The purpose of a dark archive is to function as a repository for information that can be used as a failsafe during disaster […]
- dark fiber
Dark fiber refers to unused fiber-optic cable. Often times companies lay more lines than what’s needed in order to curb costs of having to do it again and again. The dark strands can be leased to individuals or other companies who want to establish optical connections among their own locations. In this case, the fiber […]
Short for dark Internet, in file sharing terminology, a darknet is a Internet or private network, where information and content are shared by darknet participants anonymously. Darknets are popular with users who share copy protected files as the service will let users send and receive files anonymously — that is, users cannot be traced, tracked […]
(1) Data is distinct pieces of information, usually formatted in a special way. All software is divided into two general categories: data and programs. Programs are collections of instructions for manipulating data. Data can exist in a variety of forms — as numbers or text on pieces of paper, as bits and bytes stored in […]
- data at rest
The term used to describe all data in storage but excludes any data that frequently traverses the network or that which resides in temporary memory. Data at rest includes but is not limited to archived data, data which is not accessed or changed frequently, files stored on hard drives, USB thumb drives, files stored on […]