Tokamaks are naturally pulsed devices because the plasma current is driven by a transformer. Advanced tokamaks are those with designs that address this limitation. Typical designs foresee continuous operation with the current driven by a combination of non-inductive external drive and the natural pressure-driven currents that occur in plasmas. They would require careful optimisation of pressure and confinement. They are being studied both theoretically and experimentally (at Culham, JET and elsewhere) as continuous operation is highly desirable for fusion power production and their relatively small size results in a more economical power plant than an ITER-like design.