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Click one of the letters above to be taken to a page of all terms beginning with that letter.
r
RAIDsearch for term
A method of accessing multiple individual disks as if the array were one larger disk, spreading data access out over these multiple disks. RAIDi improves access time and reduces the risk of losing all data if one drive fails.
RAMsearch for term
Temporary storage built into a computer system that functions as a 'workspace' for data and program instructions.
Raster graphicsearch for term
A computer image made up of a collection of dots. Can become ragged or otherwise distorted when the image is enlarged or shrunk. See also vector graphic.
Real-time communicationsearch for term
Communication in which information is received at (or nearly at) the instant it's sent. Real-time communicationi is a characteristic of synchronous learning.
Resolutionsearch for term
The clarity of the image on the video display screen.
RFIDsearch for term
A wireless information-transmission technology set to take the place of bar codes. A tag is placed on the object and then read by an antenna and transceiver. The object does not need to be in the same line of sight as the transceiver, as products with bar codes do, and the transceiver can function over greater distances than bar code readers.
RFPsearch for term
A document produced by a company seeking goods or services and distributed to prospective suppliers. Suppliers then provide proposals based on the criteria specified within the RFPi.
RIOsearch for term
A collection of content, practice, and assessment items assembled around a single learning objective. RIOs are built from templates based on whether the goal is to communicate a concept, fact, process, principle, or procedure. (Pronounced 'REE-O')
ROIsearch for term
Generally, a ratio of the benefit or profit received from a given investment to the cost of the investment itself. In e-learning, ROIi is most often calculated by comparing the tangible results of training (for example, an increase in units produced or a decrease in error rate) to the cost of providing the training.