2. HTTP://EN.WIKIPEDIA.ORG/WIKI/TWITTER Twitter is a make high-pitched sounds, as of birds, but in this cause it is a social network website that compatible external applications such as smart phones that allow users to send and read messages called tweets. However, senders can restrict message delivery to just their followers. Users may subscribe to other users' tweets—this is known as following and subscribers are known as followers.

3. HTTP://EN.WIKIPEDIA.ORG/WIKI/SKYPE HTTP://WWW.GOOGLE.COM/SEARCH?HL=EN&RLZ=1R2GPEA _EN&DEFL=EN&Q=DEFINE:SKYPE&SA=X&EI=D5LATDVNOOZU GQE86PN0DA&VED=0CBSQKAE Skype is a software application that allows users to make voice calls over the Internet. Calls to other users within the Skype service are free, while calls to both traditional landline telephones and mobile phones can be made for a nominal fee using a debit-based user account system.

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5. HTTP://WWW.KAYAK.COM/ABOUT KAYAK is a travel search site. Everybody knows what a search site is, and everybody knows what a travel site is. KAYAK is like both, but it’s different in some important ways. Like a search site, we help you find what you want. What makes us different is that we’re specialized. Our tools are made to deeply understand things like airfares and hotel stays. And like a travel site we have flights and hotels. But we’re very different from most travel sites because we don't actually sell plane tickets, hotel rooms, or anything else. We help people find the best travel choices easily by searching the data from hundreds of travel sites at once. KAYAK lets you compare options, and when you find something that fits your budget and tastes, you book it where you want: at the airline site, from the hotel, or from a travel agent.

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7. HTTP://WWW.ZILLOW.COM/CORP/ABOUT.HTM BiddingForTravel.com provides links to other sites, where you can bid on traveling location as well as hotels.