Abstracting and indexing The following abstracting and indexing services cover the journal: According to the Journal Citation Reports, the journal has a 2020 impact factor of 0.333. Notable papers The Bell System Technical Journal and its successors published many papers on seminal works and revolutionary achievements at Bell Labs, including the following: In 1928, Clinton Joseph Davisson published a paper on electron diffraction by nickel crystal, thus unambiguously establishing the wave nature of electron. This discovery led to a widespread acceptance of particle-wave duality of matter and won him the 1937 Nobel Prize in Physics. Claude Shannon's paper "A Mathematical Theory of Communication", which founded the field of information theory, was published as two-part article in July and October issue of 1948. The journal previously published numerous articles disclosing the internal operation of the long-distance switching system used in direct distance dialing (DDD) in the Bell System in the 1950s and 1960s. Articles such as those by A.Weaver and N.A. Newel (In-Band Single-Frequency Signaling), and by C. Breen and C.A. Dahlbom (Signaling Systems for Control of Telephone Switching) enabled phone phreaks to develop the blue box apparatus, which mimicked the switching system's signals to allow them to make free long-distance calls. Many landmark papers from the developers of the UNIX operating system appeared in the UNIX themed July and August 1978 issue. The 2009 Nobel Prize physicists Willard Boyle and George E. Smith described their new charge-coupled device in the journal in a 1970 paper. See also TWX Magazine Bell Laboratories Record Scientific journal References External links The Bell System Technical Journal, Volumes 1 through 36 (1922-1957) archived at The Internet Archive 1922-1960 CAS Source Index (CASSI), search for Bell System Technical Journal Defunct journals of the United States Publications established in 1996 Publications established in 1922 IEEE academic journals Engineering journals Publications disestablished in 1983 Bell Labs English-language journals House organs Telephony