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Open-source software is computer code released under a license that grants everyone the right to use, study, modify, and redistribute the source. The Open Source Initiative maintains the ten-point Open Source Definition that a license must satisfy. Common licenses include GPL, LGPL, MIT, Apache 2.0, and Mozilla Public License.
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A project publishes its source code in a public repository under a license approved by the Open Source Initiative or the Free Software Foundation. Anyone can clone the repository, read the code, run it locally, modify it, and redistribute the modified version, subject to the license terms. Copyleft licenses like the GNU General Public License require derivative works to stay open; permissive licenses like MIT and Apache 2.0 allow closed-source forks. Contributors submit patches through pull requests that maintainers review and merge. Foundations such as the Linux Foundation, Apache Software Foundation, and Free Software Foundation govern many major projects, providing legal, financial, and infrastructure support. Users typically consume open-source software directly, through a commercial support subscription, or as the engine inside a hosted service, all of which are compatible with the licenses.
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Schools and universities have used open-source software for decades because it removes per-seat licensing that scales badly with student headcount, gives IT teams direct access to fix or extend the code, and avoids vendor lock-in that has stranded campuses when a proprietary vendor is acquired or discontinued. The European Commission Free and Open Source Software Auditing project, the US Federal Source Code Policy, and UNESCO recommendations on open educational resources all treat open source as a strategic choice, not just a cheaper one. Familiar examples in education include Moodle for learning management, Linux for servers, LibreOffice for productivity, Koha for library management, and OpenEduCat for education ERP. Open-source stacks also make it easier for computer science students to learn from real production code, which many curricula now treat as a formal learning outcome.
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- Source code publicly available under an OSI-approved license such as GPL, LGPL, MIT, or Apache 2.0
- Rights to use, study, modify, and redistribute with no per-user royalty
- Community or foundation governance with transparent issue trackers and roadmaps
- Optional paid support, hosting, or Enterprise editions from commercial vendors
- Interoperability through open standards and public APIs instead of proprietary formats
- Auditable security posture because researchers can inspect the code directly
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What is the difference between open-source and free software?
The Free Software Foundation coined "free software" to emphasize the four freedoms: use, study, modify, and redistribute. The Open Source Initiative later coined "open source" to emphasize the practical development model. Almost every free software license is also OSI-approved and vice versa, so the terms are used interchangeably. The umbrella term FOSS covers both. The main philosophical difference is that the FSF prioritizes user freedom; the OSI prioritizes code quality and collaboration.
Is open-source software really free?
The source code is free of licensing cost, which is often the largest line item in proprietary software. However, running open-source software still requires hosting, staff time, integration work, and sometimes paid support subscriptions. Total cost of ownership studies from Gartner and the European Commission show open source usually wins on TCO for education workloads because per-student licensing scales linearly while infrastructure and staff costs stay flat.
What are the most common open-source licenses?
The GNU General Public License, or GPL, requires derivative works to remain open under the same terms. The Lesser GPL, or LGPL, applies the same rule to the library but allows closed applications to link to it, which is why OpenEduCat uses LGPLv3. The MIT License and Apache 2.0 are permissive: closed-source forks are allowed, and Apache adds explicit patent grants. The Mozilla Public License 2.0 sits between the two.
Is open-source software secure?
Yes, when maintained. Because the source is public, security researchers can audit it directly and disclosure is faster than for closed products. The Linux Foundation Core Infrastructure Initiative and the Open Source Security Foundation, or OpenSSF, coordinate scanning and hardening of widely used projects. Independent audits by Gartner and the US Cybersecurity and Infrastructure Security Agency show that well-maintained open-source projects match or exceed comparable proprietary tools on time-to-patch and CVE resolution.
Which open-source tools do schools commonly use?
Moodle for LMS, Linux for servers, LibreOffice for productivity, Koha for library, Nextcloud for file sharing, Jitsi for video conferencing, DSpace for institutional repositories, and OpenEduCat for the education ERP. Many campuses also run PostgreSQL, Apache, and Nginx underneath their commercial applications. UNESCO and the Free Software Foundation both maintain reference lists of open-source tools tailored to education.
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