Switching Systems, by American Telephone and Telegraph Company (oversize HC, 1961, ex-lib, $7, which is 1/3 the internet price.)
"This course is concerned with telephone switching. Telephone switching is the means by which a communication channel capable of carrying analogue or digital information between any two subscribers is established and maintained."
This 1961 look back can be found on the new non-fiction table. (L-eng)
