Preview lessons, content and tests

Computer Science & Programming solved. All in one platform.

1. To trial the platform and take tests, please take a few seconds to SIGN UP and SET UP FREE.
2. Searching for something specific? See our text overview of all tests. Includes 'real teacher' use videos.

Join 30000+ teachers and students using TTIO.

Open Source vs Closed Source

Free/open-source software – the source availability model used by free and open-source software (FOSS) – and closed source are two approaches to the distribution of software. Just for the record, did you know there are alternatives to WINDOWS as an operating system? Check out this link.

Suggested Video

Proprietary software, also known as non-free software, or closed-source software, is computer software for which the software's publisher or another person retains intellectual property rights—usually copyright of the source code, but sometimes patent rights

History of Open Source Software and lists (open source)