Tuesday, November 3, 2009
Wikipedia
Wikipedia was created by Jimmy Wales and Larry Sanger. Wikipedia uses the open editing model called "wiki". Except for a few vandalized pages that can be edited only by established users, or in extreme cases only by administrators, every article may be edited anonymously or with a user account, while only registered users may create an article. No article is owned by its creator or any other editor, or is vetted by any recognized authority; rather, the articles are collectively owned by a community of editors. Wikipedia started 8 years ago, January 15, 2001.
Social Networking Websites
Social networking sites
Facebook - Facebook is a social networking website that is by Facebook Inc. Like most social networking sites the user can add friends and send them messages, and update their profiles to describe themselvesto others. The website's name comes from the name of books given at the start of the year by university administrations to try and help the students get to know each other better.
Mark Zuckerberg founded Facebook with his college roommates and some of his computer science classmates Eduardo Saverin, Dustin Moskovitz and Chris Hughes while he was a student at Harvard University. The website's membership was first only limited to Harvard students, but it was then expanded to other colleges in Boston, the Ivy League, and Stanford University. It also expanded further to include any university student, then high school students, and, finally, to anyone aged 13 and over. At the moment the website has more than 300 million users worldwide.
Bebo – Bebo is an acronym that stands for "Blog early, blog often". It is a social networking website, founded in January 2005. It can be used in many countries including Ireland, Canada, the United States, the United Kingdom, New Zealand and Australia. A Polish version was launched recently, which uses a different database. There are plans for French German and other versions. Bebo was founded by husband and wife Michael and Xochi Birch. Bebo was bought by AOL on March 13, 2008 for £417 million worldwide.
Privacy - Bebo has three privacy levels: public, private and fully private. Public profiles can be seen by anyone, except that profiles of users younger than 16 years are seen only by logged in users. Private profiles are seen only by their friends and members of any school or college they have joined. Fully private profiles are ones that have not joined any school and so only their direct friends can view their profile. If people choose the 'Public' option, they can also set an age restriction on who can contact them. Age restrictions do not apply to direct friends. Bebo also allows people to set their photos to private, so only friends can see them and can stop others from copying them too.
Twitter - Twitter is a social networking and micro-blogging service that enables users to send and read messages called tweets. Tweets are posts that can be as much as 140 characters long that are displayed on the author's profile page and delivered to the author's subscribers who are known as followers. Senders can stop delivery to those in their circle of friends or allow open access. Users can send and receive tweets via the Twitter website, Short Message Service (SMS) or external applications. The service costs nothing to use, but using it on mobile phones can cost a fee. The 140 character limit on messages was set so SMS messaging could be used.
Since it was created in 2006 by Jack Dorsey, Twitter has gained popularity worldwide. It is sometimes described as the "SMS of the Internet" since the use of Twitter's sending and receiving of short text messages.
Privacy - Twitter collects personal information about its users and shares it with third parties. The service considers that information invaluable, and reserves the right to sell it if the company changes owners. While Twitter displays no advertising, advertisers can target users based on their history of tweets and sometimes may quote tweets in ads.
A security issue was reported on April 7 2007 by Nitesh Dhanjani and Rujith, because Twitter used the phone number of a sender of an SMS message as authentication, and users could update someone else's status page by using SMS ‘spoofing’. The security issue could only be used if the spoofer knew the phone number registered to their victim's account. Within a few weeks of this discovery Twitter introduced an optional personal identification number (PIN) that its users could use to authenticate SMS messages. (Story taken from a page on Wikipedia).
Facebook - Facebook is a social networking website that is by Facebook Inc. Like most social networking sites the user can add friends and send them messages, and update their profiles to describe themselvesto others. The website's name comes from the name of books given at the start of the year by university administrations to try and help the students get to know each other better.
Mark Zuckerberg founded Facebook with his college roommates and some of his computer science classmates Eduardo Saverin, Dustin Moskovitz and Chris Hughes while he was a student at Harvard University. The website's membership was first only limited to Harvard students, but it was then expanded to other colleges in Boston, the Ivy League, and Stanford University. It also expanded further to include any university student, then high school students, and, finally, to anyone aged 13 and over. At the moment the website has more than 300 million users worldwide.
Bebo – Bebo is an acronym that stands for "Blog early, blog often". It is a social networking website, founded in January 2005. It can be used in many countries including Ireland, Canada, the United States, the United Kingdom, New Zealand and Australia. A Polish version was launched recently, which uses a different database. There are plans for French German and other versions. Bebo was founded by husband and wife Michael and Xochi Birch. Bebo was bought by AOL on March 13, 2008 for £417 million worldwide.
Privacy - Bebo has three privacy levels: public, private and fully private. Public profiles can be seen by anyone, except that profiles of users younger than 16 years are seen only by logged in users. Private profiles are seen only by their friends and members of any school or college they have joined. Fully private profiles are ones that have not joined any school and so only their direct friends can view their profile. If people choose the 'Public' option, they can also set an age restriction on who can contact them. Age restrictions do not apply to direct friends. Bebo also allows people to set their photos to private, so only friends can see them and can stop others from copying them too.
Twitter - Twitter is a social networking and micro-blogging service that enables users to send and read messages called tweets. Tweets are posts that can be as much as 140 characters long that are displayed on the author's profile page and delivered to the author's subscribers who are known as followers. Senders can stop delivery to those in their circle of friends or allow open access. Users can send and receive tweets via the Twitter website, Short Message Service (SMS) or external applications. The service costs nothing to use, but using it on mobile phones can cost a fee. The 140 character limit on messages was set so SMS messaging could be used.
Since it was created in 2006 by Jack Dorsey, Twitter has gained popularity worldwide. It is sometimes described as the "SMS of the Internet" since the use of Twitter's sending and receiving of short text messages.
Privacy - Twitter collects personal information about its users and shares it with third parties. The service considers that information invaluable, and reserves the right to sell it if the company changes owners. While Twitter displays no advertising, advertisers can target users based on their history of tweets and sometimes may quote tweets in ads.
A security issue was reported on April 7 2007 by Nitesh Dhanjani and Rujith, because Twitter used the phone number of a sender of an SMS message as authentication, and users could update someone else's status page by using SMS ‘spoofing’. The security issue could only be used if the spoofer knew the phone number registered to their victim's account. Within a few weeks of this discovery Twitter introduced an optional personal identification number (PIN) that its users could use to authenticate SMS messages. (Story taken from a page on Wikipedia).
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