OOP Object-Oriented Programming
Object-oriented programming design, object-oriented programming language (OOPL) and Object-Oriented (OO) concepts to write programs. OOP program using several conventional methods do not have important features:
1. Package (ENCAPSULATION): the object (OBJECT) data and procedures for the implementation of hiding, only properties (PROPERTY) and methods (METHOD) for the external reference .
2. inheritance (INHERIT): can be an object to generate a new object, using most of the original definition, while the re-definition or adding new attributes and methods to comply with the new object features .
3. polymorphisms (POLYMORPHISM): different data type code using the same methods with different names .
4. Overload (OVERLOADING): can be re-defined operand ( OPERATOR) function.

Open Source
Refers to all the open source software programs, the biggest feature is that developers / users can view inside the code, modify the program, and can be obtained free of charge.
"Open Source" also means open-source organizations (OSI) for certification marks. The organizationDefinitionOpen source software can be summarized as follows:
software distribution to others shall not impose any restrictions on
must be open source, so that users can be improved
The revised software can not be with the original software using the same name or version number
A few more familiar open-source software including the Linux operating system, Apache Web server, sendmail mail server, Netscape Comunicator open-source version of the browser (Mozilla), and the OpenOffice office software.
"Open source" movement in 1998, made by Eric Raymond, but this idea is actually a continuation from Richard Stallman (Free Software Foundation founder) from 1984 began to advocate the free software movement (free software). free software is often treated as "free" software, but it is wrong to view, free does not mean free money, but that users have "free" modify the program and re-distribution rights.
Open-source derived from the commercial market considerations, Eric Raymond realizing the "free software" had been given too much political significance, leading to the enterprise is always avoided and a distance, so in February 1998 announced the opening of Netscape browser device source code is followed by introduction of "open source" to replace the term "free software", and actively promote into the commercial market.
Generally, software vendors do not want to open the code view changes to outsiders, such known as proprietary (proprietary) software, or closed (closed) software, on the open-source software, compared with the closed, interested readers can get See Eirc Raymond written byChurch and Market (The Cathedral and the Bazaar) a text.

Open Text Software Company
1 Internet (INTERNET) search engine (SEARCH ENGINE) software vendor, product name LIVELINK.

OpenDoc OS
A composite document (COMPOUND DOCUMENT) specifications and programming interface (API), similar to the Microsoft (MICROSOFT) of the OLE.