When you execute a DIR command, filenames appear in the first column and extensions appear in the second column. Frequently used to make overhead transparencies. A program or part of a program that converts files from one format to another. For example, PageMaker has a filter that converts Microsoft Word documents into a form readable by PageMaker. A program that displays information about users logged on to a particular system.
Typical information is name, last login time, idle time, and can include a user-created plan.
A network security system that helps prevent unauthorized access and also prevents legitimate users accessing the Internet from the local network. A firewall usually consists of a single machine that's connected to the Internet and all Internet traffic must pass through that machine. Software that is made of hardware. A user-upgradable memory device that is mapped into a PC's upper memory. See also BIOS floating point Using an exponent with numbers in order to indicate the location of the decimal point.