Contacts and events
Skype's main view gives a quick overview of your contacts
and if they're offline or not. It also tells you if you have any missed calls,
voicemails or messages, and how much Skype Credit you have left.
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Windows 
Mac OS
X 
Linux 
Pocket PC 
Mobile Calling with Skype
Calling someone on Skype is simple, find them on your
Contacts and click the big, green calling button. You can also do free video
calls.
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During the call
Calls to other people on Skype are crystal-clear some
people say it feels like the person is right next to you. Once you're done with
the call click the red button to hang up.
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Conference call
Skype is perfect for doing quick conference calls. Up to
ten people can join a conference call and you can even dial in people on their
mobiles or home phones.
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Calling phones
With SkypeOut you can call other people even if they don't
have a computer. It's a nice way to call any phone anywhere in the world, and
it's all pretty cheap.
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Send large files
Need to send an important document to your colleague?
Downloaded a cool picture from the web that you want your friends to see? Just
send it over with Skype file transfer. Its secure and encrypted like the rest
of Skype, and handles files of any size.
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Chat
You can type in addition to talking and you can invite up
to 99 other friends to join in and make it a big friendly group chat. Chat is
great for organizing events, discussing projects and more.
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Video call
Smile, wave and say "Hi" over a free video call. And video
is not limited to a small window within your Skype, you can blow it up to
full-screen. Cool, no?
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History
History tab keeps track of all your history - your past calls, chats, missed events, files you've sent and more. From here it's really easy to find that important chat, check call durations etc.