94 pages. 43MB. One of several issues published (and expanded) between 1958 and 1992. Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

2,098 pages. Communication Engineering is concerned with the planning, design, implementation, and operation of the network of channels, switching machines, and user terminals required to provide communication between distant points.

This three-volume book is written for the practicing Transmission Engineer and for the student of transmission engineering.

Contributed and optimized for viewing on mobile devices by Karl Brose. Processed by Paul Fassbender.

1090 pages. 50MB. A History of Engineering and Science in the Bell System - The Early Years (1875-1925). First printing - 1975. Text searchable. Relatively low res images to keep file size low.  Find higher resolution images in the version posted on archive.org (about 380MB), but it is missing pages 446-7, 556-7, 664-5, 942-3 and 994-5. Processed by Karl Brose, Jack Ryan, Sam Hallas and Paul Fassbender.

768 pages, 80 MB, 500-468, A History of Engineering and Science in the Bell System - National Service in War and Peace (1925-1975). Missing pages 24, 25 and 504. Contributed by Sam Etler. Processed by Paul Fassbender

652 pages. 34MB. A History of Engineering and Science in the Bell System.  Switching Technology (1925 - 1975), 1982.  Contributed by Sam Etler, with post-processing by Clint Gilliland. 

687 pages. 36MB. A History of Engineering and Science in the Bell System.  Physical Sciences (1925 - 1980), 1983.   Contributed by Sam Etler, with post-processing by Clint Gilliland. 

541 pages, 44 MB, 500-471, A History of Engineering and Science in the Bell System - Communications Sciences (1925-1980). Contributed by Sam Etler. Processed by Paul Fassbender.

370 pages, 8MB. A History of Engineering and Science in the Bell System - Electronics Technology (1925-1975). Copyright and First Printing 1985. Chapters on the Transistor, Silicon Integrated Circuits, Electron Tubes, Optical Devices, Magnetic Memories, Piezoelectric Devices, Relays and Switches, Capacitors and Resistors, and Thin-Film Circuits. Contributed, scanned and OCRed by Sam Etler. Cover, bookmarks and size reduction by Karl Brose. Processed by Paul Fassbender.

825 pages, 83 MB, 500-473, A History of Engineering and Science in the Bell System - Transmission Technology (1925-1975). Missing page 566. Contributed by Sam Etler. Processed by Paul Fassbender.

902 pages. 48MB. Processed and Bookmarked by Steph Kerman.