The Time Projection Chamber (TPC) is the main tracking detector in the central barrel of the ALICE experiment. The task of large acceptance tracking in a heavy ion experiment is similar to that encountered in the NA49 and STAR experiments at the SPS and RHIC respectively. However, the extreme multiplicities projected for the ion collisions at the LHC have set qualitatively and quantitatively new demands making new designs indispensable and leading to some innovative solutions. This seminar will give an overview of the ALICE TPC main components, including some of the most crucial aspects addressed by the R&D activities, with special focus on the front-end and readout electronics.