Hmm...you triple posted...but anyway...T&L is transform and lighting. Transform is (i think) setting up the scene to be rendered, and lighting is obviously, lighting. This was traditionally done by the CPU, the GeForce was the first consumer card to bring hardware T&L on board the video card. The GeForce, all GTS based cards, Radeon, and the Savage 2000(don't know if it works though) all have hardware T&L. Since you mentioned the GTS, it is capable of around 25 million triangles/second, and up to 8 lights in hardware. T&L has to be specifically coded for, and developers were slow to catch on, however, now more T&L enabled games are appearing. Not nearly as many as Nvidia promised though...