23-letter words containing compa
- backwards compatibility — backward compatibility
- compact disc read-write — Compact Disc Rewritable
- compact disc recordable — (storage) (CD-R) A write-once version of CD-ROM. CD-Rs can hold about 650 megabytes of data. They are very durable and can be read by normal CD-ROM drives, but once data has been written it cannot be altered. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-R discs have a dye-based recording layer and an additional golden reflecting layer. Digital information is written to the disc by burning (forming) pits in the recording layer in a pattern corresponding to that of a conventional CD. The laser beam heats the substrate and recording layer to approximately 250 C. The recording layer melts and the substrate expands into the space that becomes available. See also CD-RW and DVD-RAM.
- compact disc rewritable — (storage) (CD-RW) A rewritable version of CD-ROM. A CD-RW drive can write about 650 megabytes of data to CD-RW media an unlimited number of times. Most CD-RW drives can also write once to CD-R media. CD-RW media cannot be read by CD-ROM drives built prior to 1997 due to the reduced reflectivity (15% compared to 70%) of CD-RW media. CD-RW drives and media are currently (1999) more expensive than CD-R drives and media. CD-R is sometimes considered a better technology for archival purposes as the data cannot be accidentally modified or tampered with, and encourages better archival practices. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-WR discs have a phase-change recording layer and an additional silver (aluminium) reflecting layer. A laser beam can melt crystals in the recording layer into a non-crystalline amorphous phase or anneal them slowly at a lower temperature back to the crystalline state. The different reflectance of the areas make them appear as the 'pits' and 'lands' of a standard CD. See also CD-R and DVD-RAM.
- comparative advertising — a form of advertising in which a product is compared favourably with similar products on the market
- comparative linguistics — the study of the correspondences between languages that have a common origin.
- de-compartmentalization — to divide into categories or compartments.
- differential compaction — differences in the extent to which sediment is compacted owing to topographic irregularities of the surface on which it is deposited.
- frozen food compartment — a compartment of a refrigerator or fridge-freezer for the storage of frozen food
- hook-and-ladder company — a company of firefighters equipped with a hook-and-ladder truck.
- keep (a person) company — to stay with (a person) so as to provide companionship
- multimedia compact disc — (storage) (MMCD) A CD-ROM standard for storing 4.7 GB of data including video. MMCD is being developed by a large numer of computer manufacturers and is expected to be shipped in late 1996 or early 1997. Initially it will be aimed at the consumer market, then perhaps in CD-ROM format for computers, and maybe later on erasble CD.
- pharmaceuticals company — a company specialising in developing and marketing pharmaceuticals
- private limited company — a company whose shares can be bought by the public
- publicly-quoted company — a company whose shares are traded on a stock exchange
- to keep someone company — If you keep someone company, you spend time with them and stop them feeling lonely or bored.
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