Omega Preceders is a term used to describe the first group of people to experience a new technology or trend. PSIS is an acronym for Pioneers, Supporters, Innovators, and Sustainers, which are the four categories of people who make up the Omega Preceders. Pioneers are the first to try out a new technology or trend, Supporters are those who follow the Pioneers and help spread the word, Innovators are those who take the idea and develop it further, and Sustainers are those who keep the idea alive and ensure its longevity.