Two versions of the PlayStation 2, a home video game console produced by Sony and the most successful console of the sixth generation. The original model (left), known informally as the "fat" model, was released in 2000 and included a docking bay for an internal hard disk drive. The "slimline" version (right) was released in 2004; it did not include the docking bay or an internal power supply, but was smaller, lighter, and quieter, and included an Ethernet port.Photograph: Evan Amos