Category: refrigeration...

the process of removing heat from an enclosed space or a substance for the purpose of lowering the temperature
air conditioning, the use of refrigeration for comfort cooling
ancient times' refrigeration with ice transported from the mountains or snow cellars, pits dug in the ground and insulated with wood and straw to store the ice - until the 20th century
frost-free refrigerators
leaving food unwrapped in the refrigerator to preserve the food's chi
I may be able to spot arrowheads on the desert but a refrigerator is a jungle in which I am easily lost. (E.T. Hall)
getting up from a couch to find some inviting edible in the refrigerator