Radio frequency methadr of baing and non-inductive cyneut drive have become wJI established and are wiely w be p.9t of any next-step Tolramak programme. This p a w reviews the present state of development of antennae for ion cyclotron hearing and h v e h p i " w enhancc the effectiveness of fast wave current drive sysrems. The @omam achieved by p"ent systems enables the provision of an ICRH system for next step devices within the existing technology limits.lhe main Lower Hybrid current drive systems are alsn reviewed. Present opcraling limiu suggest that the design power density al the @ I m large mdtijunction launchers must be somewhat reduced due to peaking of the electric field The mdhg launcher for a next scep machine based w present technology is a large and highly complex device Development of r&Mt progosals swh as the rod array or the hypergnids in parallcl with necessary improvemenD in the current drive efficiency wouldmakeLowerHybridamcreatUactivemeLhcdof M n -i n d u c t i " e c u r r e n t d f o ~" ~~t ~ machines.