24-letter words containing c, a, l, f, s
- professional corporation — a corporation formed by one or more licensed practitioners, especially medical or legal, to operate their practices on a corporate plan. Abbreviation: PC, P.C.
- public relations officer — a person who is responsible for communications with the public
- quick-assembly furniture — furniture such as shelves and cupboards which you buy as a number of separate pieces and assemble yourself
- referential transparency — (programming) An expression E is referentially transparent if any subexpression and its value (the result of evaluating it) can be interchanged without changing the value of E. This is not the case if the value of an expression depends on global state which can change value. The most common example of changing global state is assignment to a global variable. For example, if y is a global variable in: f(x) { return x+y; } g(z) { a = f(1); y = y + z; return a + f(1); } function g has the "side-effect" that it alters the value of y. Since f's result depends on y, the two calls to f(1) will return different results even though the argument is the same. Thus f is not referentially transparent. Changing the order of evaluation of the statements in g will change its result. We could make f above referentially transparent by passing in y as an argument: f(x, y) = x+y Similarly, g would need to take y as an argument and return its new value as part of the result: g(z, y) { a = f(1, y); y' = y+z; return (a + f(1, y'), y'); } Referentially transparent programs are more amenable to formal methods and easier to reason about because the meaning of an expression depends only on the meaning of its subexpressions and not on the order of evaluation or side-effects of other expressions. We can stretch the concept of referential transparency to include input and output if we consider the whole program to be a function from its input to its output. The program as a whole is referentially transparent because it will always produce the same output when given the same input. This is stretching the concept because the program's input may include what the user types, the content of certain files or even the time of day. If we do not consider global state like the contents of files as input, then writing to a file and reading what was written behaves just like assignment to a global variable. However, if we must consider the state of the universe as an input rather than global state then any deterministic system would be referentially transparent! See also extensional equality, observational equivalence.
- republic of south africa — Republic of, a country in S Africa; member of the Commonwealth of Nations until 1961. 472,000 sq. mi. (1,222,480 sq. km). Capitals: Pretoria and Cape Town.
- second earl of shelburne — William Petty Fitzmaurice, 2nd Earl of, 1st Marquess of Lansdowne, William Petty Fizmaurice Lansdowne.
- serial interface adaptor — (SIA) The Ethernet driver chip used on a Filtabyte Ethernet card.
- stratificational grammar — a grammar based upon the theory that language is made up of successive strata that are interconnected by established rules.
- structural functionalism — functionalism (def 3).
- telephony user interface — (communications) (TUI) Either a software interface to telephony (e.g. a phone-capable PC) or a DTMF-based interface to software (e.g. voicemail).
- telescope user interface — (hardware, interface) (TUI) A remote control interface for a telescope.
- the last of the mohicans — a historical novel (1826) by James Fenimore Cooper.
- the official secrets act — an act of Parliament that covers the protection of information relating to state security
- trip the light fantastic — a journey or voyage: to win a trip to Paris.
- uniform resource locater — Uniform Resource Locator
- uniform resource locator — (web) (URL, previously "Universal") A standard way of specifying the location of an object, typically a web page, on the Internet. Other types of object are described below. URLs are the form of address used on the World-Wide Web. They are used in HTML documents to specify the target of a hypertext link which is often another HTML document (possibly stored on another computer). Here are some example URLs: http://w3.org/default.html http://acme.co.uk:8080/images/map.gif http://foldoc.org/?Uniform+Resource+Locator http://w3.org/default.html#Introduction ftp://wuarchive.wustl.edu/mirrors/msdos/graphics/gifkit.zip ftp://spy:[email protected]/pub/topsecret/weapon.tgz mailto:[email protected] news:alt.hypertext telnet://dra.com The part before the first colon specifies the access scheme or protocol. Commonly implemented schemes include: ftp, http (web), gopher or WAIS. The "file" scheme should only be used to refer to a file on the same host. Other less commonly used schemes include news, telnet or mailto (e-mail). The part after the colon is interpreted according to the access scheme. In general, two slashes after the colon introduce a hostname (host:port is also valid, or for FTP user:[email protected] or [email protected]). The port number is usually omitted and defaults to the standard port for the scheme, e.g. port 80 for HTTP. For an HTTP or FTP URL the next part is a pathname which is usually related to the pathname of a file on the server. The file can contain any type of data but only certain types are interpreted directly by most browsers. These include HTML and images in gif or jpeg format. The file's type is given by a MIME type in the HTTP headers returned by the server, e.g. "text/html", "image/gif", and is usually also indicated by its filename extension. A file whose type is not recognised directly by the browser may be passed to an external "viewer" application, e.g. a sound player. The last (optional) part of the URL may be a query string preceded by "?" or a "fragment identifier" preceded by "#". The later indicates a particular position within the specified document. Only alphanumerics, reserved characters (:/?#"<>%+) used for their reserved purposes and "$", "-", "_", ".", "&", "+" are safe and may be transmitted unencoded. Other characters are encoded as a "%" followed by two hexadecimal digits. Space may also be encoded as "+". Standard SGML "&
;" character entity encodings (e.g. "é") are also accepted when URLs are embedded in HTML. The terminating semicolon may be omitted if & is followed by a non-letter character. - universal life insurance — a type of insurance in which the payments of the insured are placed in an investment fund, earnings from which pay the premium on term life insurance while any remainder continues to increase the policy's value.
- virtual software factory — (programming, tool) (VSF) A product from Systematica which allows users to develop CASE tools appropriate to any software engineering methodology.
- volume table of contents — (storage) (VTOC) /V-tock/ A special file on a disk, which contains a list of all the ordinary files on the disk and their addresses. Also called a directory. The term is used mostly with large mainframe disk drives. Storage administrators will often refer to the VTOC to obtain information on the number of files stored on a disk.
- water of crystallization — water of hydration, formerly thought necessary to crystallization: now usually regarded as affecting crystallization only as it forms new molecular combinations.