Video conferencing allows participants at different locations to communicate via transmitted audio and video. Early cell phones were not well-suited for video chatting due to expensive dedicated phones, poor image/sound quality, and awkward camera placement. Skype is popular free video chat software that allows conference calls, file sharing, and calls to phones. It has been widely adopted by businesses for communicating remotely, collaborating on documents, improving customer service, and facilitating international relationships. Education has also benefited from video conferencing for remote tutoring, author sessions, and student question and answer sessions.