All courses in the PADI curriculum have a section of knowledge development and a practical side, which is generally completed in a body of water. There are a few exceptions where the practical application takes place on dry land, such as Emergency Oxygen Provider or Equipment Specialist. In the past, this knowledge development would be completed in a classroom, usually at a dive centre, through instructor-led presentations. With all the new technological applications available nowadays, it is possible to join your virtual classroom from the comfort of your home using the PADI eLearning platform. E-Learning, otherwise known as electronic learning, is a way to educate or train yourself by utilising digital resources.