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Formed in 1995, the company traces its roots to director of meteorology Jeff Masters' PhD work at the University of Michigan and takes its name from a Bob Dylan song. Want to know the weather for your upcoming ski vacation or how volcanoes effect climate change? The Weather Underground's wunderground.com Web site won't rain on your parade. The company draws climate data from more than 13,000 personal weather stations worldwide. Features of the site include zip code searches, radar and satellite images, historical weather data, and Webcams showing more than 2,000 locations globally. The Weather Underground also provides updates to newspapers and TV stations and offers weather packages for other Web sites.

TheStreet.com, Inc., together with its subsidiaries, operates as a digital financial media company in the United States. TheStreet.com provides various subscription-based and advertising-supported content and tools to its readers and advertisers through a range of online platforms, including Web sites, mobile devices, email services, widgets, blogs, podcasts, and online video channels. Its Web sites include TheStreet.com, RealMoney.com, Stockpickr.com, BankingMyWay.com, MainStreet.com, and TheStreet.com Ratings. TheStreet.com, Inc. was founded in 1996 and is based in New York, New York.

Since everyone, including Dick and Harry, have Internet firms, TOM Group has moved beyond the Web. The company began with portal Web sites targeting audiences in China, Hong Kong, and Taiwan; but after the dot-com bust it expanded to also include publishing ("Business Weekly" and "PC Home"), outdoor advertising (billboards, street-level signs, bus bodies), and television (through Chinese satellite channel China Entertainment Television, CETV). The company operates its Web holdings through subsidiary TOM Online. Previously active in sports marketing, TOM Group exited that business in 2007 in order to focus its resources on its four other business groups.

Tucows Inc., together with its subsidiaries, provides Internet services worldwide. The company offers reseller services, including domain services, email services, personal names service, SSL digital certificates, and platypus ISP billing solutions. It also provides domain names through YummyNames, a portfolio of various classes of domain names, such as gems, premium names, direct navigation names, and surname. In addition, it offers various retail services, such as domain registration, email, and other Internet services through Hover.com. Further, Tucows company provides content services through tucows.com, a directory site offering reviews of and links to approximately 40,000 shareware, freeware, and demo software packages; and butterscotch.com that provides television-like shows and video tutorials designed to visually teach users about technology and the Internet. Tucows Inc. provides domain name registration, security, and identity products through digital certificates; and email through its global Internet-based distribution network of Internet service providers, Web hosting companies, and other providers of Internet services. Tucows company was formerly known as Infonautics, Inc. and changed its name to Tucows Inc. in August 2001. Tucows was founded in 1992 and is based in Toronto, Canada.

Evan Williams, Jack Dorsey, and Biz Stone co-founded Twitter in 2006. Here's less than 140 characters for ya: trivial texts or not, every one's all a-twitter about tweeting. Twitter operates a free digital service site that blends social networking with the ability to post short messages (or micro-blogs) limited to 140 characters or less, commonly known by users as "Tweets." Twitter's service is designed for use on personal computers and via mobile devices, such as iPhone and BlackBerry smart phones. When accessed through the Internet, Tweets are published on a poster's personal Web page. Tweets can be restricted to select viewers, or viewed by anyone.

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