open

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open

1. Nautical free from navigational hazards, such as ice, sunken ships, etc.
2. Music
a. (of a violin or guitar string) not stopped with the finger
b. (of a pipe, such as an organ pipe) not closed at either end
c. (of a note) played on such a string or pipe
3. Commerce
a. in operation; active
b. unrestricted; unlimited
4. (of a wound) exposed to the air
5. (esp of the large intestine) free from obstruction
6. Chess (of a file) having no pawns on it
7. Maths (of a set) containing points whose neighbourhood consists of other points of the same set
8. Computing (of software or a computer system) designed to an internationally agreed standard in order to allow communication between computers, irrespective of size, maufacturer, etc.

open

[′ō·pən]
(electricity)
Condition in which conductors are separated so that current cannot pass.
Break or discontinuity in a circuit which can normally pass a current.

open

(1)
To prepare to read or write a file. This usually involves checking whether the file already exists and that the user has the necessary authorisation to read or write it. The result of a successful open is usually some kind of capability (e.g. a Unix file descriptor) - a token that the user passes back to the system in order to access the file without further checks and finally to close the file.

open

(2)
Abbreviation for "open (or left) parenthesis" - used when necessary to eliminate oral ambiguity. To read aloud the LISP form (DEFUN FOO (X) (PLUS X 1)) one might say: "Open defun foo, open eks close, open, plus eks one, close close."

open

(3)
Non-proprietary. An open standard is one which can be used without payment.

open

(1) To engage a file for reading and writing. Technically, an app is "run" and the data file is "opened." For example, after a word processing application is "loaded and run," a document is "opened" for editing or printing. Then, the document is "closed," and the app is "exited." Apps are also said to be "opened" and "closed."

In the case of a script or batch file, "open" can mean "open" for editing or "open and run." The difference is significant. Opening a batch file to edit its contents causes no action until the user makes changes, whereas opening and running a batch file causes instructions to be executed. Contrast with close.

(2) To "run" a program (application). "Open" is increasingly used to mean "load and run."

(3) With regard to a switch, open is "off." See switch.

(4) Made to operate or function compatibly with other products. See open architecture, open system and open source.
References in periodicals archive ?
Meanwhile, Dr Lee said they have designated an open-air smoking area on the first floor of the Parliament building following a smoking ban which came into effect last month.
#381ilinskaacute is a popular open-air market close to the main railway station at which Bratislavans buy fresh vegetables and fruit but also bread and pastries from local farmers from Bratislava and its vicinity.
Open-air camps for prisoners is a novel step adopted by the state government to aid the rehabilitation of prisoners.
With that open-air roadmap firmly established as a popular formula, gamers everywhere are dying to know what's next for the franchise.
| Manley Mere Open-air swimming now runs at Manley Mere, in Frodsham, on Tuesday evenings and Saturday mornings (PS6.50 per swim).
"As a result, the camp was relying heavily on open-air burn pit operations to dispose of its solid waste.
"Open-air theatre lends itself perfectly to pre-show picnics," says Karen Armstrong, Gregynog Hall director.
The Edgbaston venue will play host to open-air music concerts and theatre shows.
I can remember the open-air school on Marsh Hill, and went there once to a sports day.
and M&M Consulting announce an agreement for the marketing and sales of M&M's ASAP[TM] technology for open-air mass spectrometry, consolidating sales of two major open-air ionization methods through one distribution network.
Summary: Thousands of tickets for open-air Masses during Pope Benedict XVI's visit to Britain this week are yet to be sold.