Common Gateway Interface

Common Gateway Interface (CGI) is a standard way for web servers to interface with executable programs installed on a server that generate web pages dynamically. Such programs are known as CGI scripts or simply CGIs; they are usually written in a scripting language, but can be written in any programming language.

History

In 1993 the National Center for Supercomputing Applications (NCSA) team wrote the specification for calling command line executables on the www-talk mailing list; however, NCSA no longer hosts the specification. The other Web server developers adopted it, and it has been a standard for Web servers ever since. A work group chaired by Ken Coar started in November 1997 to get the NCSA definition of CGI more formally defined. This work resulted in RFC 3875, which specified CGI Version 1.1. Specifically mentioned in the RFC are the following contributors:

CGI

CGI may refer to:

Technology

Organizations

CGI Group

CGI Group Inc.,Conseillers en gestion et informatique more commonly known as CGI, is a global information technology (IT) consulting, systems integration, outsourcing, and solutions company headquartered in Montreal, Canada. Founded in 1976 by Serge Godin and André Imbeau as an IT consulting firm, the company soon began branching into new markets and acquiring other companies. CGI went public in 1986 with a primary listing on the Toronto Stock Exchange. CGI is also a constituent of the S&P/TSX 60, and has a secondary listing on the New York Stock Exchange. After almost doubling in size with the 1998 acquisition of Bell Sygma, CGI acquired IMRGlobal in 2001 for $438 million, which added "global delivery options" for CGI. Other significant purchases include American Management Systems (AMS) for $858 million in 2004, which grew CGI's presence in the United States, Europe and Australia and led to the formation of the CGI Federal division.

CGI Federal's 2010 acquisition of Stanley, Inc. for $1.07 billion almost doubled CGI's presence in the United States, and expanded CGI into defense and intelligence contracts. In 2012 CGI acquired Logica for $2.7 billion Canadian, making CGI the fifth-largest independent business processes and IT services provider in the world, and the biggest tech firm in Canada. In 2014 CGI ranked No. 974 on the Forbes Forbes Global 2000, which ranks the world's largest public companies. At the time CGI had assets worth USD $11.1 billion, annual sales of $9.9 billion, and a market value of $9.6 billion. As of 2015 CGI is based in forty countries with around 400 offices, and employs approximately 65,000 people. Canada made up 15% of CGI's client base of March 2015. 29% was in the United States, while around 40% of their commissions came from Europe. 15% was the rest of the world.

Private

Private may refer to:

Privates redirects here and may refer to:

See also

Private (rocket)

Private was an experimental rocket developed by the California Institute of Technology on behalf of the United States Army. Tested in two different configurations, it provided the proof of concept that a fin-stabilised ballistic missile was technologically feasible, and led to the development of the Corporal ballistic missile.

History

The Private program was begun in 1944 as an outgrowth of work by the California Institute of Technology's Guggenheim Aeronautical Laboratory that had produced the first practical jet-assisted take-off (JATO) rockets. A proposal to adapt the JATO rockets for research into the development of ballistic missiles was accepted, and the first flight of the Private A rocket, developed under the direction of Tsien Hsue-shen, took place in December 1944, conducted at Camp Irwin in California.

Private A was an unguided, fin-stabilised ballistic rocket; it consisted of a JATO unit equipped with cruciform tail fins, and a set of four T22 booster rockets that were jettisoned after launch. This made Private A the first multistage rocket to be flown in the United States.

Information hiding

In computer science, information hiding is the principle of segregation of the design decisions in a computer program that are most likely to change, thus protecting other parts of the program from extensive modification if the design decision is changed. The protection involves providing a stable interface which protects the remainder of the program from the implementation (the details that are most likely to change).

Written another way, information hiding is the ability to prevent certain aspects of a class or software component from being accessible to its clients, using either programming language features (like private variables) or an explicit exporting policy.

Overview

The term encapsulation is often used interchangeably with information hiding. Not all agree on the distinctions between the two though; one may think of information hiding as being the principle and encapsulation being the technique. A software module hides information by encapsulating the information into a module or other construct which presents an interface.