OPERATIVE SYSTEM Type of server and offered services. Operative System running on the server. Character set and language of the site. Represents HTML declared type (e.g.: XHTML 1.1, HTML 4.0, the new HTML 5.0) The language of coursera.com as detected by CoolSocial algorithms. Site Traffic trend during the last year. Only available for sites ranked 100000 in the world. Referring domains for coursera.com by MajesticSeo. High values are a sign of site importance over the web and on web engines. Facebook link NOT FOUND The total number of people who like website Facebook page. The total number of people who tagged or talked about website Facebook page in the last 7-10 days. The URL of the found Facebook page. A Facebook page link can be found in the homepage or in the robots.txt file. Facebook Timeline is the new layout of Facebook pages. The type of Facebook page. The description of the Facebook page describes website and its services to the social media users.