Radio Buttons - A group of buttons on the computer screen of which only one can be selected at a time (by clicking on it).Radio buttons are used a lot with interactive forms on World Wide Web pages.

RAM (Random Access Memory) - RAM is the place in a computer where the operating system, application programs, and data in current use are kept so that they can be quickly reached by the computer's processor. RAM is much faster to read from and write to than the other kinds of storage in a computer, the hard disk, floppy disk, and CD-ROM. Access time is also frequently used to describe the speed of disk drives. Disk access times are measured in milliseconds (thousandths of a second), often abbreviated as 'ms'. Fast hard disk drives for personal computers boast access times of about 9 to 15 milliseconds, but hard disks are about 200 times slower than average computer DRAM memory..

Real Audio - The de facto standard for streaming audio data over the World Wide Web. RealAudio was developed by RealNetworks and supports FM-stereo-quality sound. To hear a Web page that includes a RealAudio sound file, you need a RealAudio player or plug-in, a program that is freely available from a number of places.

Reboot - A warm boot, or a boot after the computer has not been turned off for long.

Recycle Bin - On a Windows desktop, the recycle bin is like a trash basket where unneeded files can be thrown away. Dragging a file into the recycle bin removes it from its former place on the computer, and emptying the recyle bin deletes all the files in the bin.

Remote - At a distance; in communications, referring to a system, application, or device that must be accessed through a network.Contrast local.

Registry - A database used by the Windows operating system (Windows 95 and NT ) to store configuration information.

RFC - (Request For Comments) -- The name of the result and the process for creating a standard on the Internet. New standards are proposed and published on line, as a Request For Comments. The Internet Engineering Task Force is a consensus-building body that facilitates discussion, and eventually a new standard is established, but the reference number/name for the standard retains the acronym RFC, e.g. the official standard for e-mail is RFC 822.

Remote Echo - A copy of the data being received is returned to the sending system for display on the screen. See Full/Half duplex.

Resolution - Refers to video resolution displayed on a computer display. There are several levels of resolution VGA (640x 350 pixtels), Super VGA which is 800x600 or 1250x850 etc. Resolution may also refer to the amount of colors displayed, like 16 colors, 256 colors, 16bit High Color, 32bit True Color, etc.

Router - A computer that connects two or more networks. A special-purpose computer (or software package) that handles the connection between 2 or more networks. Routers spend all their time looking at the destination addresses of the packets passing through them and deciding which route or part of the internet to send them on.