20june2019 paper1 Q41
0. Which of the following is an example of proprietary system software?
- Option : D
- Explanation : Proprietary software, also known as closed- source software, is a non-free 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. Examples of proprietary software include Microsoft Windows, Adobe Flash Player, PS3 OS, iTunes, Adobe Photoshop, Google Earth, mac OS (formerly Mac OS X and OS X), Skype, WinRAR, Oracle's version of Java and some versions of Unix.
