Skype has a great engineering team, which I like to describe as 'all of Estonia.'
Simply put, broadband voice is an interstate matter that must be dealt with through clear national standards.
What is special about VOIP is that it's just another thing you can do on the Internet, whereas it is the only thing - or nearly the only thing with the exception of the dial-up modem and fax - that you can do on the public switched telephone network.
Very few people use landline phones for much of anything. So when you talk about things like online chat and social media messages and emails, what you're really talking about is the full extent of human communication.
What we are doing is taking advantage of the broadband Internet to provide basically unlimited free calls to anyone at a higher voice quality than they can with the phone lines.
Skype is easy enough to use so that people don't need to be tech savvy - a lot of users just want to communicate with their friends and family, and they find this is the easiest, cheapest way.
When I was building robots in the early 1990s, the problems of voice recognition, image understanding, VOIP, even touchscreen technologies - these were robotics problems.
I also love to surf the Net and talk on the phone with friends.
Skype is for any individual who has a broadband Internet connection.
Some people are using landline connections and dial-up modems to call ISPs in other countries and get onto the Internet. Still others are using satellite connections.
If you can use a Web browser, you can use Skype.