30-letter words containing c, a, t, h, o, d
- adenosine cyclic monophosphate — cyclic AMP.
- advanced technology attachment — (storage, hardware, standard) (ATA, AT Attachment or "Integrated Drive Electronics", IDE) A disk drive interface standard based on the IBM PC ISA 16-bit bus but also used on other personal computers. ATA specifies the power and data signal interfaces between the motherboard and the integrated disk controller and drive. The ATA "bus" only supports two devices - master and slave. ATA drives may in fact use any physical interface the manufacturer desires, so long as an embedded translator is included with the proper ATA interface. ATA "controllers" are actually direct connections to the ISA bus. Originally called IDE, the ATA interface was invented by Compaq around 1986, and was developed with the help of Western Digital, Imprimis, and then-upstart Conner Peripherals. Efforts to standardise the interface started in 1988; the first draft appeared in March 1989, and a finished version was sent to ANSI group X3T10 (who named it "Advanced Technology Attachment" (ATA)) for ratification in November 1990. X3T10 later extended ATA to Advanced Technology Attachment Interface with Extensions (ATA-2), followed by ATA-3 and ATA-4.
- bend over, here it comes again — (humour) (BOHICA) An utterance of frustration by computer support personnel who anticipate being told (usually via phone) to do something that can't be done, by a boss who doesn't know his ass from deep center field about what he's asking his minions to do.
- british indian ocean territory — a UK Overseas Territory in the Indian Ocean: consists of the Chagos Archipelago (formerly a dependency of Mauritius) and formerly included (until 1976) Aldabra, Farquhar, and Des Roches, now administratively part of the Seychelles. Diego Garcia is an important US naval base
- college of advanced technology — (formerly) a college offering degree or equivalent courses in technology, with research facilities. In the mid-1960s these were granted university status
- compound document architecture — (file format) (CDA) DEC's set of standards for compound document creation, storage, retrieval, interchange and manipulation.
- computational adequacy theorem — This states that for any program (a non-function typed term in the typed lambda-calculus with constants) normal order reduction (outermost first) fails to terminate if and only if the standard semantics of the term is bottom. Moreover, if the reduction of program e1 terminates with some head normal form e2 then the standard semantics of e1 and e2 will be equal. This theorem is significant because it relates the operational notion of a reduction sequence and the denotational semantics of the input and output of a reduction sequence.
- cross my heart and hope to die — promise
- dichlorodiphenyldichloroethane — (organic chemistry) An organochlorine insecticide that is a metabolite of DDT.
- erythrocyte sedimentation rate — the rate at which red blood cells settle in a vertical tube, used to detect the presence of disease; ESR
- gesell developmental schedules — a rating system designed to evaluate the cognitive, motor, language, and social development of pre-school-age children by observing their performance on developmental tasks, as reaching, walking, and using sentences.
- gram-schmidt orthogonalization — a process for constructing an orthogonal basis for a Euclidean space, given any basis for the space.
- graph-oriented object database — (language, database) (GOOD) A graph manipulation language for use as a database query language.
- knights of the lambda-calculus — A semi-mythical organisation of wizardly LISP and Scheme hackers. The name refers to a mathematical formalism invented by Alonzo Church, with which LISP is intimately connected. There is no enrollment list and the criteria for induction are unclear, but one well-known LISPer has been known to give out buttons and, in general, the *members* know who they are.
- leader of the house of commons — a member of the Government having primary authority in initiating legislative business
- magnetohydrodynamic generation — the production of electric power without the use of rotating machinery by passing a plasma through a magnetic field.
- northwest indian confederation — a battle site on the Maumee River, near present-day Maumee, Ohio, where a confederation of Indian tribes (Northwest Indian Confederation) was defeated by Gen. Anthony Wayne (1794): state park.
- pedagogic algorithmic language — ["PAL - A Language for Teaching Programming Linguistics", A. Evans Jr, Proc ACM 23rd Natl Conf, Brandon/Systems Press (1968)].
- to knock something on the head — If you knock something on the head, you stop it.
- to put your cards on the table — If you put or lay your cards on the table, you deal with a situation by speaking openly about your feelings, ideas, or plans.
- united nations children's fund — UNICEF.
- upright database technology ab — (company) The Swedish company that developed the Mimer SQL database.
- weights and measures inspector — an official who is responsible for ensuring that traders use standard units of measurement; a trading standards officer
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