Q
Quad-core processor : Chip with four separate processors.
Query : Request for specific data from database.
Queue : Lineup of multiple jobs within the buffer.
R
Radio Frequency Identification(RFID) : Protocol that defines how a network uses radio signals to communicate with a tag placed in or attached to an object , an animal or a person.
Raster Image Processor (RIP) : device that handles computer output as a grid of dots. Dot-matrix, inkjet, and laser printers are all raster image processors.
Rave : To annoy someone by persistently talking about something.
Random Access : Type of data access in which The ability of a computer to find and go directly to a particular storage location without having to search sequentially from the beginning location; also called direct Access.
Random Access Memory (RAM) : Type of memory that can be read from and write to by the processor and other devices .Programs and data are loaded into RAM from storage devices such as a hard diskand remain in RAM as long as the computer has contineous power.
Rambus DRAM(RDRAM ): Type of RAM that uses pipeling technology.
Raw data : Unprocessed, typically unformatted, data, such as a stream of bits that has not been filtered for commands or special characters.
Read : To transfer data,instruction and information from an external storage medium into internal storage (main memory).
README : File containing information that the user either needs or will find informative and that might not have been included in the documentation.
Read only Memory (ROM) : Type of nonvolatile memory that is used to store permnanent data and instructions.
Read/write Heads : Mechnisim in hard drive that reads data or write data as it barely touches the disk's recording surface.
Real mode : Mode in whic the processor can execute only one program at a time. It can access no more than about 1 MB of memory, but it can freely access system memory and input/output devices.It is the only mode possible in the 8086 processor and is the only operating mode supported by MS-DOS
Real time : Describles that computer must respond to situations as they occur ; characteristic of aircraft guidance systems, transaction-processing systems and scientific applications.
Real-time system : Computer and/or a software system that reacts to events before the events become obsolete.
Real-time streaming : Process of delivering a streaming media file via a specialized streaming media server using real time streaming protocol (RTSP). With real-time streaming, the file itself actually plays on the streaming media server, even though it is viewed on the computer that opened the file.
Really simple syndication(RSS) :Specification that content aggregators use to distribute contents to subscribers.
Reboot : To restart a computer by reloading the operating system.
Receive : Accept data from an external communications system, such as a local area network or a telephone line and store the data as a file.
Recompile : To compile a program again, because of changes that needed to be made in the source code in response to error messages generated by the com-piler
Record : A collection of all the information pertaining to a particular subject.
Recursion : Ability of a routine to call itself ;enables certain algorithms to be implemented with small, simple routines, but it does not guarantee speed or efficiency.
Recover : Return to a stable condition after some error has occurred.
Recovery :The restoration of lost data or the reconciliation of conflicting or erroneous data after a system failure. Recovery is often achieved using a disk or tape backup and system logs.
Recovery Disk : Special disk that contains a few system files capable of restarting a computer,which is used when the computer cannot boot from its hard disk.
Recycle Bin : Folder in Windows OS,represented by an icon on the screen resembling a basket decorated with the recycling logo. A file in the Recycle Bin is not actually deleted from the disk until the user opens the Recycle Bin, selects the file, and presses the Delete key; until then, the user can retrieve it.
Redlining : A word processing feature that allows writers and editors to display the additions and deletions they have made in a document. Redlining in drafts of reports, contracts, and manuscripts makes it easy for others to see the changes that have been made.
Redundancy :Using one or more servers/devices to perform identical tasks. If one of the crashes, another assumes its tasks. Redundancy ensures that system will continue to function if one of the device /server stops working.
Redundant Array of idependant disks (RAID) : Group of two or more integrated hard disks that function as a single storage unit.
Re-engineering : To change the way work is done in order to maximize the benefits of new technology; to rethink and redefine processes and procedures .
Refactoring : Process of reorganizing a computer program without changing its functionality. Refactoring a program means dividing it up into conceptual units and eliminating repetitious code.
Refresh :to update the contents of a window to show information that has changed.
Reginal ISP : Internet service provider that provides Internet access to a specific geographic area.
Registers : Small, high speed storage locations in a process that temporarilly hold data and information.
Registry :central hierarchical database of Servaral files that contains the system configuration information.
Regression Testing : Complete retesting of a modified program, rather than a test of only the modified routines, to ensure that no errors have been introduced with the modifications.
Relational Database : Database system that stores information in tables (rows and columns) of data and conducts searches by using data in specified columns of one table to find additional data in another table.
Relational model : Data model in which the data is organized in relations (tables).
Release : Version of a product that is available in general distribution.
Reliability : Likelihood of a computer system or device continuing to function over a given period of time and under specified conditions.
Reload : Load a program into memory from a storage device again in order to run it, because the system has crashed or the program’s operation was otherwise interrupted.To retrieve a new copy of the Web page currently visible in a Web browser.
Remote Communications : Interaction with a remote computer through a telephone connection or another communications line.
Remote Installation Services : Software services that allow an administrator to set up new client computers remotely, without having to visit each client. The target clients must support remote booting.
Remote Surgery : Surgery in which surgeon performs an operation on a patient who is not located in the same physical room as the surgeon; also called telesurgery.
Removeable Hard Disk : Hard Disk that can be inserted and removed fron the device.
Render : To produce a graphic image from a data file on an output device such as a video display or printer.
Repetitive Strain Injury(RSI) : An occupational disorder of the tendons, ligaments, and nerves caused by the cumulative effects of prolonged repetitious movements; appearing with increasing frequency among office workers who spend long hours typing at computerized workstations that are not equipped with safeguards such as wrist supports.
Replace : Allows user to substitute existing character or word in a document with new ones.
Replay attack : Attack in which a valid message is intercepted and then repeatedly retransmitted, either for fraudulent purposes or as part of a larger attack scheme.
Replication : In a distributed database management system, the process of copying the database or parts of it, to the other parts of the network
Repository : Collection of information ;data dictionary.
Reserved word : Word that has special meaning to a program or in a programming language.
Reset button : A device that restarts a computer without turning off its power.
Resolution : Number of horizontal and vertical pixels in a display device.
Resources : Hardware, softwares,data and information shared using the network.
Response time : The time a computer takes to execute a command.
Restore : Copy files from a backup storage device to their normal location, especially if the files are being cop-ied to replace files that were accidentally lost or deleted.
Restore Program : Program that reverses the backup process and returns back up files to their original form.
Retinal Scanner : Biometric device that scan the pattern of blood vessels in the back of retina.
Retrieve. To call up information from memory or storage so that it can be processed in some way.
Retrocomputing : Hobby of preserving old computer technology, either by maintaining the machines themselves or by emulating them on newer equipment.
Return key : Key on a keyboard that is used to terminate input of a field or record or to execute the default action of a dialog box
Reusability :The ability of code or a design to be usable again in another application or system.
Revolution per minute : Number of times per minute that a hard disk platter rotates.
Rip : To convert audio data from a compact disc into a WAV file or other digital format, typically in preparation for further encoding as an MP3 file
Ripple : Process of copying audio and/or viedo data from a purchased disc and saving it on digital media.
Robotics : Branch of engineering devoted to the creation and training of robots. Roboticists work within a wide range of fields, such as mechanical and electronic engineering, cybernetics, bionics, and artificial intelligence .
Robust :Able to function or to continue functioning well in unexpected situations.
ROFL : Expression, used mostly in newsgroups and online conferences, to indicate one’s appreciation of a joke or other humorous circumstance; acronym for rolling on the floor, laughing..
Rollback : Return to a previous stable condition, as when the contents of a hard disk are restored from a backup after a destructive hard disk error
Root :The main or uppermost level in a hierarchically organized set of information.
Round Robin : Sequential, cyclical allocation of resources to more than one process or device.
Roundtripping : Process of converting files from one format to another for viewing or editing and then converting the files back to the original format again.
Router : Intermediary device on a communications network that expedites message delivery.
Routine : Any section of code that can be invoked (executed) within a program.
Routing :Process of forwarding packets between networks from source to destination.
Row : A horizontal block of cells in a table or spreadsheet.
Ruler : A bar that shows the width of the page, the margin settings, the paragraph indentions, and the tab stops.
Run : process of using software .