Yuhua Wang, 65

Facebook

Facebook is a popular social networking website and platform that allows users to connect with friends, family, and other people they know or may not know, share content such as photos, videos, and status updates, and communicate with others via text, voice, and video chat. With billions of users worldwide, Facebook has become a dominant force in the realm of social media, offering a range of features such as advertising, e-commerce, and workplace communication.

Twitter

Twitter is a social media platform that allows users to share short, 280-character messages called tweets. Launched in 2006, Twitter has grown to become a popular platform for news, entertainment, and social commentary. Users can follow other users, and in turn, have followers who can see their tweets. Twitter also allows users to share images, videos, and links, and use hashtags to categorize and search for tweets related to specific topics. It has become a powerful tool for communication, public discourse, and social activism, with millions of users from around the world.

LinkedIn

LinkedIn is a social networking platform that is focused on professional connections and career development. Launched in 2003, LinkedIn has grown to become the world's largest professional network, with over 700 million users in more than 200 countries. Users can create a personal profile, list their work experience, education, and skills, and connect with other professionals in their field or related industries. The platform also offers job postings, a news feed, and groups for discussion and networking. LinkedIn has become an essential tool for job seekers, recruiters, and professionals looking to expand their network and advance their careers.

Amazon