Those of you interested in the history of cellular phones and cellular networks: There is a book on the subject "Cellular: An Economic and Business History of the International Mobile-Phone Industry" published by MIT Press, and the book is also available as PDF via Open Access: https://direct.mit.edu/books/oa-monograph/5457/CellularAn-Economic-and-Business-History-of-the #techhistory #networkhistory #vintagecomputing #cellularnetworks