  Internationalization of the higher education has created the so-called
borderless university, which provides better opportunities for learning and
increases the human and social sustainability. eLearning systems are a special
kind of software systems, developed to provide a platform for accessible
teaching and learning, including also online access to learning materials and
online support for learning and teaching. The aim of our current work is to
extract, analyse, and combine the results from multiple studies in order to
develop an RE framework for sustainable eLearning systems.
  We call a system sustainable, if it has a positive effect on and whose direct
and indirect negative impacts resulting from its development, deployment, and
usage are minimal. Sustainability has various dimensions. We classify
sustainability requirements of eLearning system to five dimensions: individual
(human), social, technical, environmental, and economic. In this paper, we
focus on human and social aspects (i.e., individual needs the relationship of
people within society), as the eLearning systems have a very strong impact on
human dimension of sustainability, where their impact on environmental
dimension is rather small. This also provides us a basis to identify the
corresponding requirements for sustainable eLearning systems. These
requirements include collaboration, learner-centred features, leadership
development and the reuse of the learning materials. As a result, achieving
individual and social requirements for eLearning systems would provide higher
quality of leaning and teaching, as well as better opportunities for learning
and increasing the human and social sustainability.
