extension


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extension

1. Commerce a delay, esp one agreed by all parties, in the date originally set for payment of a debt or completion of a contract
2. the property of matter by which it occupies space; size
3. Med a steady pull applied to a fractured or dislocated arm or leg to restore it to its normal position
4. 
a. a service by which some of the facilities of an educational establishment, library, etc., are offered to outsiders
b. (as modifier): a university extension course
5. Logic
a. the class of entities to which a given word correctly applies: thus, the extension of satellite of Mars is the set containing only Deimos and Phobos
b. conservative extension a formal theory that includes among its theorems all the theorems of a given theory

Extension

 

in metalworking. (1) Hot deformation, in which the length of a billet is increased by decreasing the area of its cross section. Extension is performed on hammers and presses by successive pressings of the billet, with a rotation of 90° after each pressing.

(2) Cold sheet pressing, in which hollow components are made from sheets. Cold extension is used to make bushings, casings for instruments and apparatus, and cans and saucepans. The billet is usually cut from a sheet, with an allowance for diameter, and is pressed into the peripheral area of the matrix. Upon the subsequent movement of the puncheon, the middle, unpressed part of the billet is pressed into the opening in the matrix.

extension

[ik′sten·chən]
(mathematics)
extension fields
(physiology)
A movement which has the effect of straightening a limb.

extension

A wing or structure added to an existing building.

extension

(filename extension)

extension

(programming)
A feature or piece of code which extends a program's functionality, e.g. a plug-in.

extension

(1) See domain extension.

(2) A software add-on. For example, extensions add functionality to Firefox and Chrome Web browsers.

(3) Prior to Mac OS X, an executable module that enhanced the Mac operating system. The Windows counterpart is a "dynamic link library" (see DLL).

(4) Enhancements to Apple's iOS 8 and OS X Version 10.10 that enable apps to share functions in other apps. See "iOS 8" in iOS versions.

(5) A file type that is appended to the end of a file name. All executable programs in the Windows and Mac worlds use extensions: .EXE in Windows; .APP in Mac (see APP file). In the Unix/Linux environment, "executables" do not use an extension, but no matter which environment, "data" files have extensions. For example, a file with a .DOC or .DOCX extension is a Microsoft Word document. A file with a .JPG extension is a JPEG image.

Prior to Windows 95, extensions were limited to three characters. Starting with Windows 95, they can be very large (254-260 characters depending on Windows version); however, they are kept small in practice.

Common Extensions and Exhaustive Lists
In this encyclopedia, more than 500 common file extensions are listed under the terms "extension," followed by their first letter such as extension a, extension b and extension c. However, there are websites that catalog many more, including the most obscure; for example, visit www.filext.com. See Win Show file extensions, dangerous extensions and graphics formats. See also domain extension.
References in periodicals archive ?
EL SEGUNDO - After leading the Lakers to their first championship in more than a decade, Shaquille O'Neal had just two requests of his employer this summer: a burly power forward and a fat contract extension.
Individuals who obtain an additional Form 1040 extension with Form 2688, Application for Additional Extension of Time To File U.
A letter ruling request is not required to obtain an automatic extension.
Based upon what our attorneys have told us, there are serious questions about whether it's legally possible to get an extension,'' Close said.
Observation: Taxpayers unable to pay their outstanding taxes at the end of the automatic fourmonth extension should attach Form 9465, Installment Agreement Request, to their returns.
For nearly a century, the Harvard Extension School--recognized as a national and international leader in the field of continuing studies--has given the wider community access to many of Harvard University's academic resources.
In the longer term, some Republicans want to try once more to pass a plan that would balance the federal budget in seven years, and they would use the debt limit extension as bait to get the president to sign it.
UC Irvine Extension has provided comprehensive paralegal training to Southern California professionals for over 29 years," says Kathleen Houts Miller, ACP, CAS.
Regulatory elections eligible for the automatic 12-month extension include:
The taxpayer, a lawyer and partner in a law firm, relied on his business partner, an attorney with tax expertise who had prepared the taxpayer's return in prior years and who had filed for the taxpayer's automatic extension, to file an additional extension of time to file his individual return.
UC Irvine Extension, the pioneer of the first "Spa and Hospitality Management" certificate program on the West Coast, has broken new ground, yet again, by offering its renowned program in a completely online platform.
In McMahan, 114 F3d 366 (1997), the Second Circuit found that reliance on an agent to file an application for an extension of time to file a Federal income tax return did not constitute reasonable cause for purposes of the failure to file penalty imposed by Sec.