Free and Open Source Software (FOSS) | Proprietary Software vs FOSS | Complete Notes | CBSE Class 12 Informatics Practices (2026–27)
Class 12 · Informatics Practices
Free and Open Source Software (FOSS)
Software plays an important role in education, business, healthcare, research, and daily life. Some software is freely available for everyone to use and improve, while other software is owned by companies and can only be used according to their license terms. Understanding these categories helps users choose software legally and responsibly.
Software Categories
Software can be broadly classified into the following categories based on ownership and licensing:
- Proprietary Software
- Free Software
- Open Source Software (OSS)
- Free and Open Source Software (FOSS)
What is Proprietary Software?
Proprietary Software is software owned by an individual or an organization. Users are allowed to use the software only according to the terms and conditions specified in its license. The source code is generally not available to users.
Characteristics
- Source code is not publicly available.
- Modification is generally not allowed.
- Redistribution is restricted.
- Usually requires purchasing a license or subscription.
- Technical support is provided by the software owner.
Examples
- Microsoft Windows
- Microsoft Office
- Adobe Photoshop
- AutoCAD
- CorelDRAW
What is Free Software?
Free Software gives users the freedom to use, study, modify, and share the software. Here, the word free refers to freedom, not necessarily zero cost.
The Four Essential Freedoms
- Freedom to run the software for any purpose.
- Freedom to study how the software works.
- Freedom to modify the software.
- Freedom to distribute original or modified versions.
What is Open Source Software (OSS)?
Open Source Software (OSS) is software whose source code is publicly available. Users can inspect, modify, improve, and distribute the software according to its license.
Characteristics
- Source code is available.
- Community-driven development.
- Transparent development process.
- Encourages collaboration and innovation.
- May be available free of cost.
What is Free and Open Source Software (FOSS)?
Free and Open Source Software (FOSS) combines the principles of Free Software and Open Source Software. It provides users with the freedom to use, study, modify, and distribute software while making the source code available.
FOSS encourages collaboration, learning, transparency, and innovation by allowing developers around the world to contribute to software development.
Characteristics of FOSS
- Source code is publicly available.
- Users can modify the software.
- Redistribution is permitted according to the license.
- Community-based development.
- Transparent and secure development process.
- Encourages innovation and learning.
Advantages of FOSS
| Advantage | Description |
|---|---|
| Low Cost | Many FOSS applications are available without licensing fees. |
| Transparency | Anyone can inspect the source code. |
| Customization | Software can be modified to meet specific needs. |
| Security | Open review helps identify and fix vulnerabilities. |
| Community Support | Developers worldwide contribute improvements. |
| Learning Opportunity | Students can study real source code. |
Disadvantages of FOSS
| Disadvantage | Description |
|---|---|
| Learning Curve | Some software may require technical knowledge. |
| Limited Official Support | Professional support may not always be available. |
| Compatibility Issues | Some proprietary file formats may not be fully supported. |
| Variable Documentation | Documentation quality may differ between projects. |
Examples of FOSS
| Software | Purpose |
|---|---|
| Linux | Operating System |
| LibreOffice | Office Suite |
| Mozilla Firefox | Web Browser |
| Python | Programming Language |
| GIMP | Image Editing |
| VLC Media Player | Media Player |
Proprietary Software vs FOSS
| Feature | Proprietary Software | FOSS |
|---|---|---|
| Source Code | Not available | Available |
| Modification | Not allowed | Allowed |
| Redistribution | Restricted | Permitted according to license |
| Cost | Usually paid | Often free or low cost |
| Development | Company controlled | Community driven |
| Examples | Windows, MS Office | Linux, LibreOffice |
Real-Life Applications
| Field | Example |
|---|---|
| Education | Python programming in schools and colleges |
| Government | Linux-based servers |
| Business | LibreOffice for office productivity |
| Web Development | Linux servers hosting websites |
| Media | VLC for playing multimedia files |
Common Errors
| Mistake | Correct Concept |
|---|---|
| "Free Software" always means no cost. | It primarily refers to freedom to use, study, modify, and share. |
| Open Source Software can be modified without following its license. | Users must follow the terms of the applicable open-source license. |
| All proprietary software is unsafe. | Proprietary software can also provide strong security and professional support. |
| FOSS has no licensing rules. | FOSS is distributed under specific open-source licenses. |
Quick Revision
| Concept | Remember |
|---|---|
| Proprietary Software | Closed source and licensed |
| Free Software | Freedom to use, study, modify, and share |
| Open Source Software | Source code is available |
| FOSS | Free + Open Source principles |
| Linux | Popular FOSS operating system |
| Python | Open-source programming language |
CBSE Exam Tips
- Remember that Free Software refers to freedom, not necessarily zero cost.
- Open Source Software makes the source code available for inspection and modification.
- FOSS combines the principles of Free Software and Open Source Software.
- Differentiate clearly between Proprietary Software and FOSS.
- Know at least four examples of FOSS such as Linux, LibreOffice, Mozilla Firefox, Python, GIMP, and VLC Media Player.
Summary
Free and Open Source Software (FOSS) promotes collaboration, innovation, and learning by allowing users to access, study, modify, and distribute software according to its license. In contrast, proprietary software restricts access to the source code and limits modification and redistribution. Understanding these software categories helps users make informed, ethical, and legal choices while using technology and is an important part of the CBSE Class 12 Informatics Practices curriculum.