It's interesting that the people are wearing short sleeves, because it was usually freezing in the computer room. Also deafening. The amount of air conditioning needed to cool the computers also resulted in keeping it fairly cold in the room.
Thinking about it more, one possibility is that they kept rolling in more and more efficient machines, but never updated the HVAC system. Also, if the floor isn't well sealed, i.e., missing tiles, the room will be colder than necessary.
