Language – the words and sentences used to make our intentions known to others and help us understand others’ intentions toward us – are only part of human-to-human communication. Non-verbal communication makes up three quarters of our ability to communicate.

Within weeks of being born we learn the meaning of a whole physical language, from a mother’s smile to a sibling’s frown. From thereon, how we sit, how we stand, where we look and what we do with our hands and feet give us clues about the thoughts, sincerity and mood of others. This article tries to discuss the possible use cases of this form of communication with a machine aka human computer interaction.