1. A process for compressing electronic data files used to display images on a display of a control associated with a heating, ventilating, and air conditioning system, said process comprising the steps of: noting the state of the first bit of a bitmapped file of information for an image to be displayed; counting the number of consecutive bits having the same binary state as the first bit; generating a numerical representation of the counted number of consecutive bits having the same binary state as the first bit; counting the number of consecutive bits having the binary state of the next bit in the bitmapped file of information and thereafter generating a numerical representation of the counted number of consecutive bits having the same binary state as the next bit in the bitmapped file; and repeatedly counting the next number of consecutive bits having a binary state differing from that of the binary state of the previously counted number of consecutive bits and thereafter generating a numerical representation of the next number of consecutive bits having the binary state differing from that of the binary state of the previously counted number of consecutive bits until there are no remaining bits of information to be counted in the bitmapped file.