GTE Directories is one of the world's largest telephone directory companies. It annually publishes or provides sales and other directory-related services for nearly 2,400 directory titles, with a total circulation of 80 million copies.
GTE publishes a telephone directory for Durham. There are approximately 100 thousand names listed in the directory. For the sake of human beings, it is helpful to publish those names in alphabetical order (Why?)
Obviously, this is done with the help of a computer.
