In the PLT experimental programme, Ohmic, neutral-injection, and ion-cyclotron heating techniques have been studied and improved, resulting in record ion temperatures. In addition, non-inductive current drive with lower-hybrid waves has been demonstrated. These achievements were made possible by the continual development and deployment of advanced plasma diagnostics, high-power RF systems, and specially tailored materials and structures. The intermediate size of PLT has permitted flexible experimental operation and the separation of plasma core from plasma surface effects.