A system allowing hardware and software from different manufacturers to be used together seamlessly
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 (management science), in management science a system that is capable of self-maintenance on the basis of throughput of resources from the environment
Open system (computer science), in the computer sciences a collection of interacting software, hardware, and human components with well-defined, publicly available interfaces maintained by a consensus process
Open system (computing), one of a class of computers that provides some combination of interoperability, portability and open software standards, particularly Unix and Unix-like systems
a computer system that can be connected with similar computer systems made by other companies
OSI, communications framework model (between different systems with different standards) that includes seven layers of communications organized according to events and occurrences
computer system which operates under agreed standards and enables it to work with all types of hardware and software (with independence from the manufacturer)