Recent progress in the area of ICRF physics is examined and summarized. A very brief summary of simplified theoretical predictions is given. Illustrative examples of experimental results in the area of ICRF heating and fast-wave current drive are given. ICRF heating is found to be highly effective in heating plasmas to high temperatures in modern tokamaks. Fast-wave current drive has been demonstrated in several experiments and the results are in good agreement with theory. Mode-conversion heating and current drive should be effective for profile control, but experimental results are still preliminary.