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 ?
The company's technology allows surgeons to perform a wide range of less invasive open-chest and minimally invasive heart operations, including a full range of stopped- and beating-heart procedures.
The success of this operation means other babies can now have the same surgery early instead of having to wait until they are big enough to endure open-chest surgery.
This is truly a collaborative approach to valve replacement that will provide another option for patients who are not candidates for open-chest surgery due to advanced age, or because they are too ill or suffering from additional medical conditions," Faraz Kerendi, M.
On average, patients who receive open-chest CABG procedures stay in the hospital five to seven days and may require up to three to four months to return to normal activities.
For the next five years, such procedures will be used primarily for high-risk patients not eligible for traditional open-chest surgery, and so won't yet be replacing conventional heart valve procedures.
In 1893, he saved the life of a man who had been stabbed, by performing one of the earliest known open-chest heart operations.
Surgical Ablation System Capable of Closed-Chest and Open-Chest Ablation of Left and Right Atria to Mimic the MAZE Procedure
For example, recovery from an open-chest procedure generally takes 8 - 12 weeks; however, following a closed-chest procedure, recovery is closer to 3 - 4 weeks.
Diagnostic options range from "watch and wait," to the most invasive open-chest procedures.
This particular type of bypass is vital to the development of robotic, closed-chest bypass procedures, and therefore proving its efficacy in open-chest procedures is critical," said Dr.