Definition. Diphtheria is a potentially fatal, contagious disease that usually involves the nose, throat, and air passages, but may also infect the skin. Its most striking feature is the formation of a grayish membrane covering the tonsils and upper part of the throat.
Prevail is a state-of-the-art, multi-user information management system that helps law firms (and similarly-structured enterprises) manage every aspect of their case information, contacts, documents, calendars, tasks, statutes, time, costs, fees and workflow.
A computer's operating system is its most important program. It is considered as trhe backbone of a computer managing both software and hardware device. Operating systems are responsible for each and everything from the control and allocation of memory to input from external devices and output to computer display. An operating system also plays a vital role in security.