Continuity-RIMM (C-RIMM) is a special module used to fill any unused RIMM slots (because there cannot be any unused RIMM slots on a motherboard). It is basically a RIMM module without any memory chips.

Cable modem provides access of computers to network over cable TV lines. Most cable modems supply a 10 Mbps Ethernet connection for the home LAN. Cable modem achieve higher access speed to the World Wide Web than phone lines using dial up modem or even ADSL modem. The actual performance of a cable modem Internet connection can vary depending on the utilization of the shared cable line in that neighborhood, but typical data rates range from 300 Kbps to 1500 Kbps.

Cache coherence is a mechanism for managing the caches of a multiprocessor system so that no data is lost or overwritten before the data is transferred from a cache to the target memory. When two or more computer processors work together on a single program, known as multiprocessing, each processor may have its own memory cache that is separate from the larger RAM that the individual processors will access.

Content Addressable Memory (CAM) is a special type of computer memory used in certain very high speed searching applications. CAM is designed such that the user supplies a data word and the CAM searches its entire memory to see if that data word is stored anywhere in it. If the data word is found, the CAM returns a list of one or more storage addresses where the word was found (and in some architectures, it also returns the data word, or other associated pieces of data). Thus, a CAM is the hardware embodiment of what in software terms would be called an associative array.

Capacitive keyboard uses changes in capacitance, or stored static electricity, to register when a user has pressed a specific key on the keyboard. The other type of keyboard called contact keyboard uses changes in flows of electricity to register. Under the keyboard keys of the capacity keyboard are capacitors that store electricity as opposite static charges in pairs of conductive plates made from nickel-plated copper that are separated by a non-conductive material. The opposite static charges hold an attractive field between them, but the insulating material prevents the charges from canceling each other out by coming together. When a key is pressed, the pads move closer to each other and change the capacity for storing a charge, which the keyboard detects as a start or stop in the flow of electricity and inputs the correct keystroke.

Latency is the rate at which RAM responds to the MCC on the motherboard. The lower the rate, the better. CAS stands for Column Array Strobe and could be described as a contact that assists the Memory Controller Chip find a specific bit of memory. Has an impact on overall latency.

Category 5 (Cat-5) is a type of network cabling that consists of four twisted pairs of copper wire terminated by RJ45 connectors. Cat-5 cabling supports frequencies up to 100 MHz and speeds up to 1000 Mbps. It can be used for ATM, token ring, 1000Base-T, 100Base-T, and 10Base-T networking.

Category 2 Cabling (CAT2), one of five grades of UTP cabling described in the EIA/TIA-586 standard, is designed to transmit data at a speed up to 4 Mbps.

Category 4 cabling (CAT4), one of five grades of UTP cabling described in the EIA/TIA-586 standard, is used in Token Ring networks and can transmit data at a speed up to 16 Mbps.

Category 6 Cable (CAT6) is the 6th generation of twisted pair Ethernet cabling defined by ANSI/EIA/TIA. CAT6 cable contains four pairs of copper wire and all utilized. CAT6 supports Gigabit (1000 Mbps) Ethernet that communications at more than twice the speed of CAT5e. CAT6 is backward compatible with Category 5 cable, Cat-5e and Cat-3. Cat-6 features more stringent specifications for crosstalk and system noise. The cable standard is suitable for 10BASE-T / 100BASE-TX and 1000BASE-T (Gigabit Ethernet) connections.

Charge-coupled device (CCD) is a device 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.

Compact Disc-Read-Only Memory (CD-ROM) is a type of read-only-memory compact disk capable of storing large amounts of data. A single CD-ROM has the storage capacity of 1 GB, equivalent to 700 floppy disks. Once a CD-ROM is pressed, new data cannot be stored and the disc cannot be erased for reuse.

Central Processor, also known as central process unit (CPU) or microprocessor, is a silicon chip made from very small transistors and other circuit elements on a single semiconductor integrated circuit (IC). At the heart of all personal computers and most workstations sits a CPU microprocessor. A CPU also controls the logic of almost all digital devices, from clock radios to fuel-injection systems for automobiles. There are many different CPU designs. But in general, the CPU consists of the control unit, the arithmetic and logic unit (ALU) and memory (registers, cache, RAM and ROM) as well as various temporary buffers and other logic. The control unit fetches instructions from memory and decodes them to produce signals which control the other part of the computer. This may cause it to transfer data between memory and ALU or to activate peripherals to perform input or output.