Open system may refer to:

Technical term

Open system (computing) Open systems are computer systems that provide some combination of interoperability, portability, and open software standards. (It can also refer to specific installations that are configured to allow unrestricted access by people and/or other c ...

, one of a class of computers and associated software that provides some combination of interoperability, portability and open software standards, particularly Unix and Unix-like systems *

Open system (systems theory) An open system is a system that has external interactions. Such interactions can take the form of information, energy, or material transfers into or out of the system boundary, depending on the discipline which defines the concept. An open syste ...

, in the natural and social sciences, a process that exchanges material, energy, people, capital or information with its environment *

Open system (thermodynamics) A thermodynamic system is a body of matter and/or radiation, confined in space by walls, with defined permeabilities, which separate it from its surroundings. The surroundings may include other thermodynamic systems, or physical systems that are ...

, in thermodynamics and physics, a system where matter and energy can enter or leave, in contrast to a closed system where energy can enter or leave but matter can not * Open system (control theory), a feedforward system that does not have any feedback loop to control its output in a control system * Open system, in

management science Management science (or managerial science) is a wide and interdisciplinary study of solving complex problems and making strategic decisions as it pertains to institutions, corporations, governments and other types of organizational entities. It is ...

a system that is capable of self-maintenance on the basis of throughput of resources from the environment * Open and closed system in social science * Open system of learning, where information is sourced from multiple sources *

Open government Open government is the governing doctrine which sustain that citizens have the right to access the documents and proceedings of the government to allow for effective public oversight. In its broadest construction, it opposes reason of state and ...

, system *

Open-system environment reference model Open-system environment (OSE) reference model (RM) or ''OSE reference model'' (OSE/RM) is a 1990 reference model for enterprise architecture. It provides a framework for describing open system concepts and defining a lexicon of terms, that can ...

, one of the first reference models for enterprise architecture * Open Distribution system (Example:

Peer-to-peer file sharing Peer-to-peer file sharing is the distribution and sharing of digital media using peer-to-peer (P2P) networking technology. P2P file sharing allows users to access media files such as books, music, movies, and games using a P2P software program th ...

system)

Proper name

Open Systems Interconnection The Open Systems Interconnection model (OSI model) is a conceptual model that 'provides a common basis for the coordination of SOstandards development for the purpose of systems interconnection'. In the OSI reference model, the communications ...

(IT company) *

Open Systems Accounting Software Open Systems Accounting Software (OSAS) is a business accounting software package for small- to medium-sized businesses using the Microsoft Windows, Linux, and Mac OS X operating systems. It has been developed and sold since 1976 by Open Systems ...

(product), an accounting and business software *

Open Systems International Open Systems International, Inc. (OSI) is an automation software company headquartered in Medina, Minnesota, with international offices in Canada, Colombia, Spain, India, Dubai, Australia, Singapore, and China. Founded in 1992, OSI is privately he ...

, supplier of open automation solutions for utilities in the electric, oil & gas, transport, and water industries * Open Systems AG, a company headquartered in Zurich, Switzerland *

Open-source software Open-source software (OSS) is computer software that is released under a license in which the copyright holder grants users the rights to use, study, change, and distribute the software and its source code to anyone and for any purpose. Op ...

, system (product) * Open publication, system (non-standard term) The system in which the exchange of both mass and energy take place through surrounding environment {{disambiguation