Q
1. QBE (Query By Example)
A software tool that enables database users to specify search criteria by providing a front end for the query language, which collects the facts about a query from the user, and composes query language statements internally.
2. Query language
A language that enables users to define their requirements for extracting desired information from a database in the form of queries.
R
1. RIP (Routing Information Protocol)
It finds the quickest route between two computers.
2. Response time
Elapsed time between ·submission of a job to a system for processing, and the first response produced by the system for the job.
3. Router
An internetworking tool used to interconnect those networks that use same high-level protocols above the network layer.
4. Routing
Selection of actual path to be used to transmit a message in a wide-area network environment.
5. RS-232-C interface
A standard interface used for interconnecting user terminals to computers. It was defined by the Electronics Industrial Association (USA).
6. Run time
Time required to complete a single, continuous, execution of an object program.
7. RARP
Reverse address resolution Protocol
8. RAM (Random Access Memory)
It is a temporary storage area that the processor uses to execute Programs and hold data. Information is put into RAM and held there. Once the RAM becomes full information has to be removed to make space for the current task being performed. A PC with limited RAM will take a long time to perform the simplest task as the information in the RAM is constantly being replaced. Ram requires a constant electric supply to keep the information intact. Should you switch off the PC then you will lose the contents of RAM forever. Different areas of RAM are: Conventional memory, Expanded Memory, Extended memory, High memory areas, upper memory area.
Types of RAM include :
- DRAM
- EDORAM
- SDRAM
9. Remote Terminal
Any terminal which is not on the same physical site as the computer to which it is attached. Access is normally via modem.
10. Replication
The sharing of computer files at multiple locations whilst maintaining an up to date copy of the shared file at all locations. A different copy of the file may be maintained at each location and replication ensures that all charges are reflected in all copies.
11. Ribbon Cable
A flat cable which contains approximately 100 parallel wires. If you are brave enough to open up you PC case you will find a ribbon cable to the PC’s had disk.
12. RS 232
The industry standard for the transmission of data between Serial (one bit at time) devices. The RS stands for recommended standard.
