See memory and computer for an explanation of how memory is used in processing data. This is also true of other types of memory chips, including ROMs and PROMs. However, unlike ROMs and PROMs, RAM chips require power to maintain their content, which is why you must save your data onto disk before you turn the computer off. Pressing any key on the keyboard or moving the mouse restores the screen. Screen savers have become very popular due to their entertainment value.
Some screen savers can degrade system performance and waste valuable PC resources.
Server - A computer in a network shared by multiple users. The term may refere to both the hardware and the software, or just the software that performs the service. Spam - The process of sending copies of the same message to large numbers of newsgroups or users on the Internet. People spam the Internet to advertise products as well as to broadcast some political or social commentary. A Communications protocol developed for the US Dept. of Defense to network different types of networking systems.