viernes, 4 de noviembre de 2016
Twitter.
For other uses, see Twitter (disambiguation).
"Tweeted" redirects here. For other uses, see Tweet (disambiguation).
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The login/sign up page of Twitter
| |
| Type of business | Public |
|---|---|
Type of site
| News and social network service |
| Available in | Multilingual |
| Traded as | NYSE: TWTR |
| Founded | March 21, 2006[1] |
| Headquarters | San Francisco, California, U.S.[2] |
| Coordinates | 37.7768°N 122.4166°WCoordinates: 37.7768°N 122.4166°W |
| Area served | Worldwide |
| Founder(s) | Jack Dorsey Noah Glass Biz Stone Evan Williams |
| Key people | Omid Kordestani (Executive Chairman) Jack Dorsey (CEO) |
| Industry | Internet |
| Revenue |  US$2.21 billion (2015)[3] |
| Net income | US$-521 million (2015)[3] |
| Employees | 3,860 (June 2016)[4] |
| Subsidiaries | Vine Periscope |
| Website | twitter |
| Alexa rank |  9 (October 2016)[5] |
| Registration | Required to post, follow, or be followed |
| Users | 313 million active users (June 2016)[6] |
| Launched | July 15, 2006[7] |
| Current status | Active |
| Written in | Java,[8][9] Ruby,[8] Scala,[8]JavaScript[8] |
Twitter (/ˈtwɪtər/) is an online news and social networking service where users post and read short 140-character messages called "tweets". Registered users can post and read tweets, but those who are unregistered can only read them. Users access Twitter through the website interface, SMS or mobile device app.[10] Twitter Inc. is based in San Francisco and has more than 25 offices around the world.[11]
Twitter was created in March 2006 by Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams and launched in July, whereby the service rapidly gained worldwide popularity. In 2012, more than 100 million users posted 340 million tweets a day,[12] and the service handled an average of 1.6 billion search queries per day.[13][14][15] In 2013, it was one of the ten most-visited websites and has been described as "the SMS of the Internet".[16][17] As of March 2016, Twitter had more than 310 million monthly active users.[6]
Facebook.
Facebook (stylized as facebook) is an American for-profit corporation and online social media and social networking service based in Menlo Park, California, United States. The Facebook website was launched on February 4, 2004, by Mark Zuckerberg, along with fellow Harvard College students and roommates, Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes.[7][8][9]
The founders had initially limited the website's membership to Harvard students; however, later they expanded it to higher education institutions in the Boston area, the Ivy League schools, and Stanford University. Facebook gradually added support for students at various other universities, and eventually to high school students as well. Since 2006, anyone age 13 and older has been allowed to become a registered user of Facebook, though variations exist in the minimum age requirement, depending on applicable local laws.[10] The Facebook name comes from the face book directories often given to United States university students.[11]
Facebook may be accessed by a large range of desktops, laptops, tablet computers, and smartphones over the Internet and mobile networks. After registering to use the site, users can create a user profile indicating their name, occupation, schools attended and so on. Users can add other users as "friends", exchange messages, post status updates and digital photos, share digital videos and links, use various software applications ("apps"), and receive notifications when others update their profiles or make posts. Additionally, users may join common-interest user groups organized by workplace, school, hobbies or other topics, and categorize their friends into lists such as "People From Work" or "Close Friends". In groups, editors can pin posts to top. Additionally, users can complain about or block unpleasant people. Because of the large volume of data that users submit to the service, Facebook has come under scrutiny for its privacy policies. Facebook makes most of its revenue from advertisements which appear onscreen.
Facebook, Inc. held its initial public offering (IPO) in February 2012, and began selling stock to the public three months later, reaching an original peak market capitalization of $104 billion. On July 13, 2015, Facebook became the fastest company in the Standard & Poor's 500 Index to reach a market cap of $250 billion.[12]Facebook has more than 1.65 billion monthly active users as of March 31, 2016.[13] As of April 2016, Facebook was the most popular social networking site in the world, based on the number of active user accounts.[14]
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Public profile of a user on Facebook in 2014 showing various social networking features of the site, including music preferences and favorite books
| |
| Type of business | Public |
|---|---|
Type of site
| Social networking service |
| Available in | Multilingual (140) |
| Traded as | NASDAQ: FB NASDAQ-100 component S&P 500 component |
| Founded | February 4, 2004 |
| Headquarters | Menlo Park, California, U.S. |
| Coordinates | 37.4848°N 122.1484°WCoordinates: 37.4848°N 122.1484°W |
| Area served | United States (2004–05) Worldwide, except blocking countries(2005–present) |
| Owner | Mark Zuckerberg (53%) [1] |
| Founder(s) | |
| Key people | Mark Zuckerberg (Chairman and CEO) Sheryl Sandberg (COO) |
| Industry | Internet |
| Revenue | US$17.928 billion (2015)[2] |
| Operating income | US$6.225 billion (2015)[2] |
| Net income | US$3.688 billion (2015)[2] |
| Total assets | US$49.407 billion (2015)[2] |
| Total equity | US$44.218 billion (2015)[2] |
| Employees | 14,495 (June 2016)[3] |
| Subsidiaries | Messenger Oculus VR |
| Website | www www |
| Alexa rank |  3 (October 2016)[4] |
| Registration | Required |
| Users | 1.71 billion monthly active users (June 30, 2016)[3] |
| Current status | Active |
| Written in | C++, PHP (as HHVM)[5] and D language[6] |
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