This document discusses distance education and open learning systems. It defines distance education as education provided outside the formal education system using correspondence or multimedia. The document lists the various names for distance education models. It describes the need for distance education to provide educational access and the objectives of increasing education levels. The key characteristics, merits, and limitations of distance education are outlined. The document also describes open school systems which provide flexible education to those over 16, and open universities like IGNOU which expand access to higher education.