In an ODL system:

	The focus is based on the learners (their characteristics, needs and interests). When an Open Learning approach is adopted organisational and management constraints are also considered, but the system is designed starting from an analysis of learners. The design of an Open Learning systems involves a series of decisions balancing learners needs with organisational requirements and policies;
	The learner has to be active and be in charge of his/her learning process;
	Objectives, contents, learning materials, support and delivery systems are all designed to meet the requirements of the target group.

In respect to the system which will be implemented, learners will be able to chose:

	What to study (individualisation of the learning path in respect of interest, needs, objectives….);
	When to study (no/or very limited timing constrains);
	How to study (often the contents are provided on different supports);
	Where to study (no limitations of the place: home, work, training centre).

The learner is not alone but is supported and guided by the tutor who play different functions: e.g. define together with the learner the learning program, support to the motivation, guide within the available resources, mediator of the communication between the learners and the training agency, facilitator of the processes, et.

From the point of view of ODL development, it is possible to identify three different generations:

	the first generation (from the XIX century to the 70’s) was characterised by correspondence courses, using paper-based written or printed materials delivered by mail. The feedback between the teacher and the learner was limited to the periods in which learners had to complete some activities;
	the second generation (from the 70’s to the 90’s) was characterised by multimedia distance learning, through printed, audio-visual, computer-based materials with feedback by phone and some individual sessions during the course (integrated training);
	the third generation (starting from the 90’s) is characterised by the use of:
		telematic networks that convey programs stored in a central computer (mainframe); the users-learners are connected to these networks through modems and personal computers;
		satellites that can be accessed simultaneously by different users-learners.