Public Broadcasting Station- it's like BBC4. Educational programs partly funded by the government, partly funded by private grants, non commercial- so it doesn't rely on ratings. This means two people could watch "The Pacific" about dugongs and it won't be taken off the air! Sweet! PBS is great because it introduced many Americans to retro British comedy shows, like Monty Python's Flying Circus, Are You Being Served?, Keeping Up Appearances, etc. I don't know why Britcoms are on PBS. Perhaps by virtue of being British, they are automatically more "posh".