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Systems with external interactions
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
Open_system_(systems_theory)
Topics referred to by the same term
Look up open system in Wiktionary, the free dictionary. Open system may refer to: Open system (computing), one of a class of computers and associated
Open_system
Body of matter in a state of internal equilibrium
the environment, a thermodynamic system may be an isolated system, a closed system, or an open system. An isolated system does not exchange matter or energy
Thermodynamic_system
Quantum mechanical system that interacts with a quantum-mechanical environment
In physics, an open quantum system is a quantum mechanical system that interacts with an external quantum system, known as the environment or the bath
Open_quantum_system
Model of communication of seven abstraction layers
The Open Systems Interconnection (OSI) model is a reference model developed by the International Organization for Standardization (ISO) that "provides
OSI_model
Prevalent ownership and land use structure in medieval agriculture
The open-field system was the prevalent agricultural system in much of Europe during the Middle Ages and lasted into the 20th century in Russia, Iran
Open-field_system
Organ system for circulating blood in animals
of blood vessels. Many invertebrates such as arthropods have an open circulatory system with a heart that pumps a hemolymph which returns via the body
Circulatory_system
Interrelated entities that form a whole
coherent entity"—otherwise they would be two or more distinct systems. Most systems are open systems, exchanging matter and energy with their respective surroundings;
System
System calls in some operating systems
In Unix-like operating systems, a program initializes access to a file in a file system using the open system call. This allocates resources associated
Open_(system_call)
Open systems are computer systems that provide some combination of interoperability, portability, and open software standards. (It can also refer to specific
Open_system_(computing)
Energy system models that are open source
Open energy-system models are energy-system models that are open source. Some may use third-party proprietary software as part of their workflows. These
Open_energy_system_models
Web syndication format
The Open Publication Distribution System (OPDS) catalog format is a syndication format for electronic publications based on Atom and HTTP. OPDS catalogs
Open Publication Distribution System
Open_Publication_Distribution_System
International technology company
Automatic Systems International, Inc. (ASI), or Open Systems International (OSI) is an automation software company headquartered in Medina, Minnesota,
Open_Systems_International
Asset portfolio of the US Federal Reserve
The System Open Market Account (SOMA) is a financial portfolio managed by the Federal Reserve Bank of New York that holds the assets it has purchased
System_Open_Market_Account
These tables compare free software / open-source operating systems. Where not all of the versions support a feature, the first version which supports
Comparison of open-source operating systems
Comparison_of_open-source_operating_systems
Law of thermodynamics establishing the conservation of energy
the open system, between its initial and final states of internal equilibrium. An open system can be in contact equilibrium with several other systems at
First_law_of_thermodynamics
Energy-related datasets for open use
Open energy system database projects employ open data methods to collect, clean, and republish energy-related datasets for open use. The resulting information
Open_energy_system_databases
Topics referred to by the same term
2009 memoir Open (process), a program launcher invoked from the command line in NeXTSTEP or Mac OS X Open (system call), standardized system call for opening
Open
An open class system is the stratification that facilitates social mobility, with individual achievement and personal merit determining social rank. The
Open_class_system
Sound server for Unix-like operating systems
The Open Sound System (OSS) is an interface for making and capturing sound in Unix and Unix-like operating systems. It is based on standard Unix devices
Open_Sound_System
Standard for archival system
The term Open Archival Information System (or OAIS) refers to the ISO OAIS Reference Model for an OAIS. This reference model is defined by recommendation
Open Archival Information System
Open_Archival_Information_System
Physical systems that don't interact with other parts of the universe
called a closed system, being enclosed by selective walls through which energy can pass as heat or work, but not matter; and with an open system, which both
Isolated_system
Software that manages computer hardware resources
code to open source operating systems; such operating systems have transparent change histories and distributed governance structures. Open source developers
Operating_system
Planetary system consisting of the Sun and objects orbiting it
The Solar System is an isolated single-star planetary system (not part of a larger star system) within the Milky Way Galaxy. The system formed about
Solar_System
Something that is simultaneously a whole and a part
sometimes discussed in the context of self-organizing holarchic open (SOHO) systems. The word holon (Ancient Greek: ὅλον) is a combination of the Greek
Holon_(philosophy)
Journal management and publishing system
Open Journal Systems, also known as OJS, is an open source and free software for the management of peer-reviewed academic journals, created by the Public
Open_Journal_Systems
The Open Source Information System (OSIS) is the former name of an American unclassified network serving the U.S. intelligence community with open source
Open Source Information System
Open_Source_Information_System
System design objective
Open systems architecture is a system design approach which aims to produce systems that are inherently interoperable and connectable without recourse
Open_systems_architecture
Communication standards for smart meters
The open metering system of the Open Metering System Group e.V. stands for a manufacturer- and media-independent standardization for Meter-Bus (M-Bus)
Open_metering_system
Voting method in which voters vote openly
open ballot system is a voting method in which voters vote openly, in contrast to a secret ballot, where a voter's choices are confidential. The open
Open_ballot_system
Metropolitan Open Space System (D'MOSS) is a system of green corridors in the city of Durban, South Africa. Implemented in 1982, the system links a number
Durban Metropolitan Open Space System
Durban_Metropolitan_Open_Space_System
An open-source voting system (OSVS), also known as open-source voting (or OSV), is a voting system that uses open-source software (and/or hardware) that
Open-source_voting_system
Macintosh multimedia software
Open Music System (OMS) was a virtual studio management application by Opcode for the Classic Mac OS. Similar to FreeMIDI by Mark of the Unicorn and Audio
Open_Music_System
Open source software organization
Open Whisper Systems (OWS) was a software development group that was founded by Moxie Marlinspike in 2013. The group picked up the open source development
Open_Whisper_Systems
Collection of co-operating systems
Dependable Evolutionary Open System-of-Systems) aiming to bring time awareness and evolution into the design of System-of- Systems (SoS) with possible emergent
System_of_systems
Organ system of the genitals and the urinary tract
Because of this, the systems are sometimes imaged together. In placental mammals (including humans), the male urethra goes through and opens into the penis
Genitourinary_system
Control paradigm in which errors are measured before they can affect a system
the system might receive. Neither open-loop control nor teleoperator systems require the sophistication of a mathematical model of the physical system or
Feed_forward_(control)
Open System Tribology is a field of tribology that studies tribological systems that are exposed to and affected by the natural environment. Factors influencing
Open_system_tribology
Reference model for enterprise architecture
Open-system environment (OSE) reference model (RM) or OSE reference model (OSE/RM) is a 1990 reference model for enterprise architecture. It provides
Open-system environment reference model
Open-system_environment_reference_model
Family of computer operating systems
new industry consortium called The Open Group In 1993, allowing the use of the mark for certified operating systems that comply with the Single UNIX Specification
Unix
learning management systems (LMS). aTutor Canvas LMS Chamilo Claroline eFront FenixEdu ILIAS LAMS LON-CAPA Moodle Open edX OLAT OpenOLAT Sakai SWAD WeBWorK
List of learning management systems
List_of_learning_management_systems
List of organ systems in the human body
nervous system Sensory nervous system Somatosensory system Visual system Olfactory system Gustatory system Auditory system Vestibular system Female reproductive
List of systems of the human body
List_of_systems_of_the_human_body
Business accounting software package
Open Systems Accounting Software (OSAS) is a business accounting software package for small- to medium-sized businesses using the Microsoft Windows, Linux
Open Systems Accounting Software
Open_Systems_Accounting_Software
Service management software
OTRS (originally Open-Source Ticket Request System) is a service management suite. The suite contains an agent portal, admin dashboard and customer portal
OTRS
Type of system
time. Glossary of systems theory Dynamical system Isolated system Open system (systems theory) Sense and Respond Thermodynamic system Rana, N.C.; P.S.
Closed_system
Science of classifying organisms
taxonomic position Numerical taxonomy – Classification system in biological systematics Open Tree of Life – Online phylogenetic tree of life Parataxonomy
Taxonomy_(biology)
Armenian-American metal band
commitment to record new music, Tankian was open to releasing a collection of previously unreleased System of a Down songs from past recording sessions
System_of_a_Down
American satellite-based radio navigation service
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta
Global_Positioning_System
Computer security organization
OWASP, the Open Worldwide Application Security Project (formerly Open Web Application Security Project), is an online community that publishes open-source
OWASP
Thermodynamically open system which is not in equilibrium
A dissipative system is a thermodynamically open system which is operating out of, and often far from, thermodynamic equilibrium in an environment with
Dissipative_system
Form of government
debating system and usually has semi-circular debating chambers. Consensus systems have more of a tendency to use proportional representation with open party
Parliamentary_system
The Open Systems Adapter (OSA) is a network controller for IBM z/Architecture, ES/9000 and S/390 mainframes. The OSA can be installed in a mainframe I/O
Open_Systems_Adapter
Role-playing game system
of the d20 System was released as the System Reference Document (SRD) under the Open Game License (OGL) as Open Game Content (OGC), which allows commercial
D20_System
First letter of the Latin alphabet
but uppercase forms are used in some other writing systems: ⟨Ɑ ɑ⟩: Latin alpha, represents an open back unrounded vowel in the IPA ⟨ᶐ⟩: Latin small alpha
A
System or group governing an organized community
A government is the system or group of people governing a country and its administrative divisions which is generally called as a state and as such the
Government
Mainframe operating system (2008–2010)
OpenSolaris for System z is a discontinued port of the OpenSolaris operating system to the IBM System z line of mainframe computers. OpenSolaris is based
OpenSolaris_for_System_z
Process by which an individual gains access to a computer system
signing on) is the process by which an individual gains access to a computer system or program by identifying and authenticating themselves. Typically, user
Login
Environment in which a piece of software is executed
NeXTSTEP Darwin macOS OpenDarwin 386BSD NetBSD OpenBSD FreeBSD DragonFly BSD System V HP-UX IBM AIX A/UX Solaris OpenSolaris illumos OpenIndiana MINIX GNU
Computing_platform
System of multiple interacting agents
multi-agent system (MAS) or "self-organized system" is a computational system composed of multiple interacting intelligent agents. Multi-agent systems can solve
Multi-agent_system
Programming language
The A-0 system (Arithmetic Language version 0) was an early compiler-related tool developed for electronic computers, written by Grace Murray Hopper in
A-0_System
Main printed circuit board used for a computing device
A motherboard, also known as a mainboard, system board, logic board, and informally mobo (see "Nomenclature" section), is the main printed circuit board
Motherboard
2026 badminton tournament in Thailand
round) "Prospectus Thailand Open 2026" (PDF). Badminton World Federation. Retrieved 11 April 2026. "World Ranking System" (PDF). Badminton World Federation
2026 Thailand Open (badminton)
2026_Thailand_Open_(badminton)
System for rating game players
Bradley–Terry model. The Elo system was invented as an improved chess rating system over the previously used Harkness rating system and has since been adapted
Elo_rating_system
Software design paradigm emphasizing ease of swapping out and modifying components
IIe have an open architecture supporting plug-in cards, whereas the Apple IIc computer has a closed architecture. Open architecture systems may use a standardized
Open_architecture
Portion of the universe chosen for analysis
Signal-flow graph Systems engineering Systems science Thermodynamic system Open quantum system Belkind, Ori (2 February 2012). Physical Systems: Conceptual
Physical_system
Enterprise modeling framework
CIMOSA, standing for "Computer Integrated Manufacturing Open System Architecture", is an enterprise modeling framework, which aims to support the enterprise
CIMOSA
or formalize within the structure of an expert system. For knowledge engineers, challenges include: Open texture: Law is rarely applied in an exact way
Legal_expert_system
Set of software frameworks for robot software development
Robot Operating System (ROS or ros) is an open-source robotics middleware suite. Although ROS is not an operating system (OS) but a set of software frameworks
Robot_Operating_System
High-capacity public transport
lines. The world's first rapid transit system was the partially underground Metropolitan Railway which opened in 1863 using steam locomotives, and now
Rapid_transit
The Polytechnic University of the Philippines Open University System is the nontraditional/distance studies unit of the Polytechnic University of the Philippines
PUP_Open_University_System
Chess opening
The London System is an opening system in chess characterized by the moves (with any first move by Black): 1. d4 2. Bf4 In addition to these moves, in
London_System
American computer company, 1982–2010
Network File System (NFS). In general, Sun was a proponent of open systems, particularly Unix. It was also a major contributor to open-source software
Sun_Microsystems
Educational software application
Record Store (LRS) List of learning management systems Massive open online course Student information system – Software for educational institutions to manage
Learning_management_system
Computer operating system
OpenVMS, often referred to as just VMS, is a multi-user, multiprocessing and virtual memory-based operating system. It is designed to support time-sharing
OpenVMS
Republic of China is primarily managed by the state-run public education system, which falls under the Ministry of Education. By law, education in the People's
Education_in_China
The Open Architecture System Integration Strategy or OASIS Model was presented by Apple Computer as the philosophy behind the Mac in marketing beginning
Open Architecture System Integration Strategy
Open_Architecture_System_Integration_Strategy
Wunderlich. The brand's current range of instruments uses the Open-Architecture-System (OAS), which is a GUI that runs using a Windows XP computer, enabling
Wersi
Web browser made by Mozilla
for various Unix and Unix-like operating systems, including FreeBSD, OpenBSD, NetBSD, and other operating systems, such as ReactOS. It is the default, pre-installed
Firefox
It is open source and runs natively on x86 platforms. Nintendo DSi system software Wii system software Nintendo 3DS system software Wii U system software
List_of_operating_systems
System to train actors
Magarshack, "the first play he produced according to his system." Breaking the MAT's tradition of open rehearsals, he prepared Turgenev's play in private.
Stanislavski's_system
Indian convention of naming large numbers
numbering system is used in India, Pakistan, Nepal, Sri Lanka, and Bangladesh to express large numbers, which differs from the International System of Units
Indian_numbering_system
Computer system with a dedicated function
An embedded system is a specialized computer system—a combination of a computer processor, computer memory, and input/output peripheral devices—that has
Embedded_system
1998 studio album by System of a Down
System of a Down is the debut studio album by the American heavy metal band System of a Down, released on June 30, 1998, by American Recordings and Columbia
System_of_a_Down_(album)
Group of neural structures responsible for motivation and desire
The reward system (the mesocorticolimbic circuit) is a group of neural structures responsible for incentive salience (i.e., "wanting"; desire or craving
Reward_system
A service system (also customer service system (CSS)) is a configuration of technology and organizational networks designed to deliver services that satisfy
Service_system
This is a list of free and open-source software (FOSS) packages, computer software licensed under free software licenses and open-source licenses. Software
List of free and open-source software packages
List_of_free_and_open-source_software_packages
Computer network protocol
Open Network Computing (ONC) Remote Procedure Call (RPC), commonly known as Sun RPC is a remote procedure call system. ONC was originally developed by
Sun_RPC
System where only the inputs and outputs can be viewed, and not its implementation
algorithm, the human brain, or an institution or government. To analyze an open system with a typical "black box approach", only the behavior of the stimulus/response
Black_box
Concept in mathematics
topological space, the neighbourhood system for a point is also a neighbourhood basis for the point. The set of all open neighbourhoods at a point forms a
Neighbourhood_system
Linux distribution
and the Nix expression language for declaring packages and system options. It is free and open-source software under the MIT License. Nix as a package manager
NixOS
Cybersecurity of open source software
Open-source software security is the measure of assurance or guarantee in the freedom from danger and risk inherent to an open-source software system
Open-source_software_security
Independent software derived from existing software
fork() system call which causes a running process to split in two – typically, to allow them to perform different tasks in parallel. Free and open-source
Fork_(software_development)
Serial number used to identify a periodical publication
loans, and other practices in connection with serial literature. The ISSN system was first drafted as an International Organization for Standardization (ISO)
ISSN
Family of distributed open-source operating systems
OpenHarmony (OHOS, OH) is a family of open-source distributed operating systems sharing some principles from Huawei LiteOS lineage. Huawei donated the
OpenHarmony
of spatial extensions to object-relational database management systems (also both open-source and commercial) created new opportunities for data storage
Geographic information system software
Geographic_information_system_software
The orders, decorations, and medals of Malaysia comprise a complex system by which Malaysians and qualified foreigners are honoured by the country's sovereign
Orders, decorations, and medals of Malaysia
Orders,_decorations,_and_medals_of_Malaysia
Open source web server and a reverse proxy server
containers. In OpenBSD version 5.2 (November 2012), Nginx became part of the OpenBSD base system, providing an alternative to the system's fork of Apache
Nginx
Closed drainage basin that has no outflow
closed basins, terminal basins, and internal drainage systems. Endorheic regions contrast with open lakes (exorheic regions), where surface waters eventually
Endorheic_basin
Annual tennis tournament held in Paris
The French Open (French: Internationaux de France de tennis), also known as Roland-Garros (French: [ʁɔlɑ̃ ɡaʁos]), is a tennis tournament organized by
French_Open
Cross-platform graphics API
books (pre-OpenGL 2.0): The Green Book OpenGL Programming for the X Window System. ISBN 978-0-201-48359-8 A book about X11 interfacing and OpenGL Utility
OpenGL
OPEN SYSTEM
OPEN SYSTEM
Boy/Male
English French American
Open.
Female
Thai/Siamese
Thai name PEN-CHAN means "full moon."
Boy/Male
American, British, English, French
Open; Variant of Darrel Open
Male
Welsh
 Modern Welsh form of Old Welsh Owain, OWEN means "born of yew." Compare with another form of Owen.
Boy/Male
English French
Open.
Boy/Male
English French
Open.
Boy/Male
English French
Open.
Male
Swedish
Norwegian and Swedish form of Old Norse Óðinn, ODEN means "poetry, song" and "eager, frenzied, raging."
Boy/Male
English
Open.
Boy/Male
French
Open.
Surname or Lastname
English
English : variant of Penn.Dutch : metonymic occupational name for a clerk or penman, from Dutch pen ‘pen’.Cambodian : unexplained.
Female
English
English short form of Latin Penelope, PEN means "weaver of cunning."
Male
Welsh
Variant form of Welsh Owen, possibly OUEN means "born of yew."
Boy/Male
English French
Open.
Boy/Male
English French
Open.
Boy/Male
Welsh
Son of Owen.
Boy/Male
English French
Open.
Boy/Male
Celtic Welsh
Son of Owen.
Boy/Male
Hindu, Indian
Open
Male
English
 Anglicized form of Irish Gaelic Eóghan, OWEN means "born of yew." Compare with another form of Owen.
OPEN SYSTEM
OPEN SYSTEM
Boy/Male
Hindu
Limitless luster, Name of Lord Buddha
Boy/Male
Tamil
Alipta | Aliceஅலீபà¯à®¤à®¾à®‚Â
Different from all, Devoted
Boy/Male
Norse Swedish English
Leader.
Boy/Male
Hindu, Indian, Marathi, Tamil
Attraction
Boy/Male
Hindu, Indian
Always Winner
Boy/Male
Australian, French, German, Hebrew, Italian, Swedish
The Lord is Good
Girl/Female
German
Warrior Maiden
Girl/Female
Indian, Kannada
Waves
Girl/Female
Hindu, Indian, Kannada
God
Boy/Male
Hindu
Gods name, Lord ramas heart
OPEN SYSTEM
OPEN SYSTEM
OPEN SYSTEM
OPEN SYSTEM
OPEN SYSTEM
a.
Not of a quality to prevent communication, as by closing water ways, blocking roads, etc.; hence, not frosty or inclement; mild; -- used of the weather or the climate; as, an open season; an open winter.
a.
With eyes widely open; watchful; vigilant.
a.
Free or cleared of obstruction to progress or to view; accessible; as, an open tract; the open sea.
n.
Open or unobstructed space; clear land, without trees or obstructions; open ocean; open water.
a.
Not drawn together, closed, or contracted; extended; expanded; as, an open hand; open arms; an open flower; an open prospect.
a.
Free to be used, enjoyed, visited, or the like; not private; public; unrestricted in use; as, an open library, museum, court, or other assembly; liable to the approach, trespass, or attack of any one; unprotected; exposed.
a.
Taking place in the open air; outdoor; as, an open-air game or meeting.
a.
Not concealed or secret; not hidden or disguised; exposed to view or to knowledge; revealed; apparent; as, open schemes or plans; open shame or guilt.
v. t.
To loosen or make less compact; as, to open matted cotton by separating the fibers.
a.
Free; disengaged; unappropriated; as, to keep a day open for any purpose; to be open for an engagement.
a.
Not settled or adjusted; not decided or determined; not closed or withdrawn from consideration; as, an open account; an open question; to keep an offer or opportunity open.
a.
Open.
v. t. & i.
To open.
a.
Uttered with a relatively wide opening of the articulating organs; -- said of vowels; as, the an far is open as compared with the a in say.
a.
Having the mouth open; gaping; hence, greedy; clamorous.
v. t.
To spread; to expand; as, to open the hand.
v. t.
To make or set open; to render free of access; to unclose; to unbar; to unlock; to remove any fastening or covering from; as, to open a door; to open a box; to open a room; to open a letter.
a.
Free of access; not shut up; not closed; affording unobstructed ingress or egress; not impeding or preventing passage; not locked up or covered over; -- applied to passageways; as, an open door, window, road, etc.; also, to inclosed structures or objects; as, open houses, boxes, baskets, bottles, etc.; also, to means of communication or approach by water or land; as, an open harbor or roadstead.
a.
Produced by an open string; as, an open tone.
v. t.
To enter upon; to begin; as, to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open a case in court, or a meeting.