Folder Extracts

Documents

pdf BTL History: Evolution of Switching in the Bell System - extract Popular

By 2011 downloads

Download (pdf, 4.53 MB)

EandS Bell System- Step-by-Step.pdf

BTL History: Evolution of Switching in the Bell System - extract

From A History of Engineering and Science in the Bell System: Switching Technology. 16-page extract titled Step by Step Improvements (pages 22-37). WE installed AE switches until production started in 1926. SxS.

pdf BTL History: National Service - 1978 - Sw Sys 300 301 301A - extract Popular

By 1158 downloads

Download (pdf, 2.76 MB)

BTL_History_National_Service_1978_Sw_Sys_300_301_301A_excerpt_tci-ocr.pdf

BTL History: National Service - 1978 - Sw Sys 300 301 301A - extract

From A History of Engineering and Science in the Bell System - National Service in War and Peace (1925-1975) - 1978
  2.3 FAA Air-Route Traffic Control System
  2.3.1 No. 300 Switching System

pdf BTL History: The Early Years (1875-1925) - 1975 - Extract - Ocr-op-r Popular

By 2952 downloads

Download (pdf, 3.19 MB)

A_History_of_Engineering_and_Science_in_the_Bell_System_-_The_Early_Years_1875-1925_prelim_ocr-op-r.pdf

BTL History: The Early Years (1875-1925) - 1975 - Extract - Ocr-op-r

From A History Of Engineering and Science In The Bell System - The Early Years (1875-1925).  71 page extract includes Table of Contents, References (27 pages), Credits and Index (28 pages).  Bookmarked. Contributed by Steph Kerman.

New User?

Read the articles under "Introduction" in the black menu bar above.

Recent Contributors

Thanks for new documents from Jim Hurtle, Ed Palazzo, Paul Fassbender, Bruce Patterson, Remco Enthoven, Jon Kolger, Paul Ivester, Len Hicken, Fred Haynes, Kurt Rudolph, Wade ("Kellogg KITT"), the Connections Museum, Rick Walsh, Jeff Lamb, Jeremy Walters, Alan David, Dennis Hock, and Tim Griffin.

Please send a file to add your name to this list!

Who's online

We have 640 guests online