Facebook And Twitter Office picture
Facebook is a social networking website that is operated and privately owned by Facebook, Inc.Users can add friends and send them messages, and update their personal profiles to notify friends about themselves. Additionally, users can join networks organized by city, workplace, school, and region. The website's name stems from the colloquial name of books given at the start of the academic year by university administrations with the intention of helping students get to know each other better.
Mark Zuckerberg founded Facebook with fellow computer science major students and his roommates Eduardo Saverin, Dustin Moskovitz and Chris Hughes while he was a student at Harvard University.Website membership was initially limited to Harvard students, but was expanded to other colleges in the Boston area, the Ivy League, and Stanford University. It later expanded further to include any university student, then high school students, and, finally, to anyone aged 13 and over. The website currently has more than 250 million active users worldwide.
Facebook has met with some controversy over the past few years. It has been blocked intermittently in several countries including Syria, China and Iran,although Iran later unblocked Facebook in 2009. It has also been banned at many places of work to discourage employees from wasting time using the service.Privacy has also been an issue, and it has been compromised several times. Facebook is also facing several lawsuits from a number of Zuckerberg's former classmates, who claim that Facebook had stolen their source code and other intellectual property.
A January 2009 Compete.com study has ranked Facebook as the most used social network by worldwide monthly active users, followed by MySpace
Twitter is a free social networking and micro-blogging service that enables its users to send and read messages known as tweets. Tweets are text-based posts of up to 140 characters displayed on the author's profile page and delivered to the author's subscribers who are known as followers. Senders can restrict delivery to those in their circle of friends or, by default, allow open access. Users can send and receive tweets via the Twitter website, Short Message Service (SMS) or external applications. While the service costs nothing to use, accessing it through SMS may incur phone service provider fees.
Since its creation in 2006 by Jack Dorsey, Twitter has gained notability and popularity worldwide. It is sometimes described as the "SMS of the Internet"since the use of Twitter's application programming interface for sending and receiving short text messages by other applications often eclipses the direct use of Twitter.
Twitter is ranked as one of the 50 most popular websites worldwide by Alexa's web traffic analysis. Although estimates of the number of daily users vary because the company does not release the number of active accounts, a February 2009 Compete.com blog entry ranked Twitter as the third most used social network based on their count of 6 million unique monthly visitors and 55 million monthly visits. In March 2009, a Nielsen.com blog ranked Twitter as the fastest-growing site in the Member Communities category for February 2009. Twitter had a monthly growth of 1,382 percent, Zimbio of 240 percent, followed by Facebook with an increase of 228 percent.However, only 40 percent of Twitter's users are retained. A recent study found that 40% of twitter messages constituted "pointless babble"