Skype is an instant messaging application that can provide video and voice call services with other Internet-connected devices or traditional phones/smartphones through system devices that are connected to the Internet, including mobile phones, tablets, etc. Users can send and receive instant messaging messages, transfer files, send and receive multimedia messages, and conduct video c... https://hackmd.io/@z21YxzZfRVulBXG5j19GQA/SJMAs4wEkx