E-learning systems are widely used from academia to industry. The usage of e-learning systems raises new research contexts. Multiple collaborative learning systems were implemented to improve people interaction, communication, working, coordinating activities, socializing and learning. E-learning systems play an significant role in the learning activities. This paper presents a critical literature review on e-learning systems; it is composed by two main parts. The first part contains a literature review on the e-learning concept and evolution. The second part consists on the concept different perspectives overlapś according to the various e-learning dimensions.

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E-learning,Online learning,Distance learning

• Ciências Físicas - Ciências Naturais