Skype is a program that allows users to make voice and video calls over the internet using Voice over Internet Protocol (VoIP) technology. It operates on a peer-to-peer model to connect users' devices for free calls between Skype users, or low-cost calls to phones. With over 250 million worldwide accounts, Skype offers features like voicemail and call forwarding and is popular for students, faculty, and staff to connect outside their local dialing areas for free or low cost. Setting up and using Skype involves downloading the program, creating an account, optionally purchasing a calling plan, finding contacts, and making calls.