There are numerous websites available that provide a rich source of information and learning across various subjects. Here are 20 popular websites that offer valuable resources: Wikipedia ( www.wikipedia.org ) - A user-edited encyclopedia covering a wide range of topics. Khan Academy ( www.khanacademy.org ) - Offers educational videos and exercises on various subjects. Coursera ( www.coursera.org ) - Provides online courses from top universities and institutions. TED ( www.ted.com ) - Features inspirational talks by experts on various topics. MIT OpenCourseWare (ocw.mit.edu) - Offers free access to course materials from MIT. Stanford Online (online.stanford.edu) - Provides online courses and resources from Stanford University. National Geographic ( www.nationalgeographic.com ) - Offers articles, videos, and photos on science, nature, and culture. Project Gutenberg ( www.gutenberg.org ) - Provides access to thousands of free e-books. Codecademy ( www.codecademy.com ) - Offers interactiv