Open System

Open system may refer to:

• Open system (computing), 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), a system where matter or energy can flow into and/or out of the system, in contrast to a closed system, where energy can enter or leave but matter may 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 a system that is capable of self-maintenance on the basis of throughput of resources from the environment
• Open Systems Interconnection, an effort to standardize computer networking
• Open and closed system in social science
• Open system in thermodynamics or in physics
• Open system of learning, where information is sourced from multiple sources
• Open-system environment reference model, one of the first reference models for enterprise architecture
• Open Systems Accounting Software, accounting and business software
• Open Systems International, 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 system
• Open Government system
• Open publication system
• Open Distribution system (Example: Peer-to-peer file sharing system)