Abstract
Online Teaching Learning (OTL) systems are the future of the education system due to the rapid developmentin the field of Information Technology. Many existing OTL systems provide distance education services in thepresent context as well. In this paper, several types of existing OTL systems are explored in order to identifytheir key features, needs, working, defects and sectors for future development. For this, different aspects, types,processes, impacts, and teaching-learning strategies of various OTL systems were studied. In addition, the paperconcludes with some future insights and personal interest in the further development of OTLs on the basis ofprevious research performed.
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