Short for constant angular velocity, a technique for accessing data off of rotating disks. With CAV, the disk rotates at a constant speed regardless of what area of the disk is being accessed. This differs from Constant Linear Velocity (CLV), which rotates the disk faster for inner tracks. Disk drives use CAV, whereas CD-ROMs generally use CLV, though some newer drives use a combination of CAV and CLV.
The advantage of CAV is that it is much simpler to design and produce because the motor doesn’t need to change speed. In addition, CLV runs into problems for very high-speed CD-ROMs because there’s a brief latency whenever the drive needs to change the rotational speed.
On eBay, eBay alternatives, and classified ad Web sites, CAYOR is an abbreviation used to mean cash at your own risk. This abbreviation is used by the seller to indicate that if the buyer chooses to pay cash for the item, and mail cash to the seller, the buyer is not responsible for missing or […]
Short for Common Biometric Exchange Formats Framework, it is a standard format for exchanging biometric data between different biometric devices and systems.
Short for constant bit rate, or Class A quality of service, an ATM bandwidth-allocation service that requires the user to determine a fixed bandwidth requirement at the time the connection is set up so that the data can be sent in a steady stream. CBR service is often used when transmitting fixed-rate uncompressed video. Compare […]
Acronym for computer-based training, a type of education in which the student learns by executing special training programs on a computer. CBT is especially effective for training people to use computer applications because the CBT program can be integrated with the applications so that students can practice using the application as they learn. Historically, CBTs […]
Short for charge-coupled device, an instrument whose semiconductors are connected so that the output of one serves as the input of the next. Digital cameras, video cameras, and optical scanners all use CCD arrays. Contrast with CIS.