A series of JET enhancements are currently conducted under EFDA. These enhancements can be divided in two categories. Near term projects, implemented mainly in the 2000­2002 period, whose main objectives are:a) to increase the heating power of the JET Octant 8 Neutral Beam Injector (NBI); b) to improve the pellet fuelling capabilities; c) to improve the diagnostics capabilities, also in support of the detailed design of the ITER divertor and of the development of scenarios with internal transport barriers. Longer term projects, in the 2000­2004 period, whose main objectives are: a) to consolidate the preparation of ITER plasma scenarios by increasing the present operating domain; b) to support design choices in key areas of subsystems of ITER. An ITER-like ICRH antenna, new or improved Diagnostics, modifications to the existing divertor to operate at higher triangularity and higher power, which will be installed during the scheduled 2004 shutdown, constitute the technical scope of the long term enhancements. The JET Enhancements benefit from significant contributions also from international collaborations with non-European laboratories. The paper presents an overview of the scientific and technical objectives, the description of the systems under design, the organisation of the activities and the planning elements.