yahoo

Yahoo! Inc. es una empresa global de medios con sede en Estados Unidos, cuya misión es "ser el servicio global de Internet más esencial para consumidores y negocios". Posee un portal de Internet, un directorio web y una serie de servicios, incluido el popular correo electrónico Yahoo!. Fue fundada en enero de 1994 por dos estudiantes de postgrado de la Universidad de Stanford, Jerry Yang y David Filo. Yahoo! se constituyó como empresa el 2 de marzo de 1995 y comenzó a cotizar en bolsa el 12 de abril de 1996. La empresa tiene su sede corporativa en Sunnyvale, California, Estados Unidos.
El 1 de febrero del 2008, Microsoft hizo una oferta no solicitada para comprar Yahoo! por 44.600 millones de US$,^[1] oferta que después sería rechazada por la compañía argumentando que la cantidad resta valor a la empresa.^[2]
El 29 de julio de 2009, se anunció que en 10 años, Microsoft tendrá acceso completo al motor de búsqueda de Yahoo para usarse en futuros proyectos de Microsoft para su motor de búsqueda Bing.

MSN

MSN (originally The Microsoft Network) is a collection of Internet sites and services provided by Microsoft. The Microsoft Network debuted as an online service and Internet service provider on August 24, 1995, to coincide with the release of the Windows 95 operating system.^[2]
The range of services offered by MSN has changed since its initial release in 1995. MSN was once a simple online service for Windows 95, an early experiment at interactive multimedia content on the Internet, and one of the most popular dial-up Internet service providers.

Microsoft used the MSN brand name to promote numerous popular web-based services in the late 1990s, most notably Hotmail and Messenger, before reorganizing many of them in 2005 under another brand name, Windows Live. MSN's Internet portal, MSN.com, is currently the 11th most visited domain name on the Internet.^[3]

Gmail is a free, advertising-supported email service provided by Google. Users may access Gmail as secure webmail, as well via POP3 or IMAP protocols. Gmail was launched as an invitation-only beta release on April 1, 2004 and it became available to the general public on February 7, 2007, though still in beta status at that time. The service was upgraded from beta status on July 7, 2009, along with the rest of the Google Apps suite. As of November 2010, it had 193.3 million users monthly. With an initial storage capacity offer of 1 GB per user, Gmail significantly increased the webmail standard for free storage from the 2 to 4 MB its competitors such as Hotmail offered at that time.Individual Gmail messages, including attachments, may be up to 25 MB,^[10] which is larger than many other mail services support. Gmail has a search-oriented interface and a "conversation view" similar to an Internet forum. Gmail is noted by web developers for its pioneering use of AJAX. Gmail runs on Google GFE/2.0 on Linux.

Windows Live Hotmail

Windows Live Hotmail, formerly known as MSN Hotmail and commonly referred to simply as Hotmail, is a free web-based email service operated by Microsoft as part of its Windows Live group. It was founded by Sabeer Bhatia and Jack Smith and launched in July 1996 as "HoTMaiL".It was the first web-based email service. Its original name and capitalization refers to HTML, the encoding language used by the World Wide Web. Hotmail was subsequently acquired by Microsoft in 1997 for an estimated $400 million, and shortly after it was rebranded as "MSN Hotmail". The current version, "Windows Live Hotmail", was officially announced in 2005 and released worldwide in 2007.
Windows Live Hotmail features unlimited storage, security measures for which patents have been filed, Ajax technology, and integration with Windows Live Messenger, Hotmail Calendar, SkyDrive and Contacts.According to comScore (August 2010) Windows Live Hotmail is the world's largest web-based email service with nearly 364 million users. Second and third are Yahoo! Mail (280 million) and Gmail (191 million). It is available in 36 different languages.
The Hotmail development and operations groups are based in Mountain View, California. When Hotmail Corporation was an independent company, its headquarters were in Sunnyvale, California.