Your computer can be your phone. With Skype you use your computer’s speakers and microphone as your phone. You can call other Skype users for free but for a very small fee you can call anyone, anywhere on their land line or cell phone. You can also have an incoming phone number so people can call you just like normal. You can also have voicemail and see missed calls and such. This is VOIP (Voice Over Internet Protocol) but sort of with a twist. Most VOIP systems have you using “normal” phones that are connected to the network. With Skype your computer is your phone.
I think it is pretty dang cool.