 AT&T published a new edition in 1955 under the title "Notes on Nationwide Dialing", and then in later editions as "Notes on Distance Dialing" in 1956, 1961, 1968 and 1975.The first use of the title "Notes on the Network" was for the 1980 edition.This document was maintained and published by Bell Communications Research (BELLCORE) in 1983 and 1986, 1990, 1994, and 1997.