Provide the web addresses and a hyper link for the three online communities you have chosen
Click on the below communities for access to site.
Facebook is a free-access social networking website that is operated and privately owned by Facebook, Inc. Users can join networks organized by city, workplace, school, and region to connect and interact with other people.Basically, you send messages to people, upload pictures, join groups, comment on pictures, chat to your friends, find friends on there from say primary school and add them and chat to them, etc. It is also safe because your not completely open to communication, not just anyone can talk to you and know one can see your profile unless you've accepted them as a friend. If someone wants to contact you, they firstly have to send you a "Friend Request" which you will receive and have the choice to either accept it or decline it. You can easily delete people from your Friends too if you decide that a person is hassling you or upsetting you, or even report people for abuse. Also any explicit content on profiles is removed by moderators and the profile it was found on is deleted.
Skype is a software program that allows users to make telephone calls over the Internet. Calls to other users of the service are free of charge, while calls to landlines and cell phones can be made for a fee. Additional features include instant messaging, file transfer and video conferencing.
Basically there's a server. You each connect to it. You talk, your voice (digitized, in packets) is sent to the server, then to their computer, where he/she hears it. When they talks the same thing happens in reverse. It's fast, but not instantaneous.
Skype has experienced rapid growth in popular usage since the launch of its services. It was acquired by eBay in September 2005 for $2.6 billion.
Twitter is a free social networking and micro-blogging service that enables its users to send and read each others' updates, known as tweets. Tweets are text-based posts of up to 140 characters, displayed on the author's profile page and delivered to other users - known as followers - who have subscribed to them. 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. The service is free over the Internet, but using SMS may incur phone service provider fees
So basically on twitter you update your status as many times as you want saying what you're doing or thinking. You can follow people on twitter and post comments on their status. It is just simply a website to post what you are doing at the moment. You can also follow people on it to see what they are constantly doing.
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