Before they had Lolcats, there were just cats that lolled. This is one of them.

Photo by drew_anywhere

Laptops are heated cat beds that humans occasionally use.
Photo by raneko

Sources of heat that humans keep on their desks, just for cats.
Photo by shimgray

A human invention that makes it easier to get into high places. Can also be used as a mobile vantage point.
Photo by Michael Cornelius