Modern Practice Of The Electric Telegraph
- The entire 19th century book by Franklin Pope is viewable at this site. This was the standard reference book used by the U.S. Signal Service.
- http://www.insulators.com/books/mpet/

J.H. Bunnell and Company
- Telegraph Key Manufacturer.
- http://www.racoon.com/jhbunnell/

Junker Key
- German Junker telegraph keys for sale.
- http://www.morsex.com/junker/

Virtual Bug
- The Virtual Bug is a computer-simulated Vibroplex semi-automatic Morse Code key, created with Macromedia Flash. It shows the workings of a bug and teaches the part names.
- http://www.ae4rv.com/tn/education/bug.htm

Bunnell Telegraph Repeaters
- N6TT's site about the early telegraph sounders.
- http://www.qsl.net/n6tt/bunn14.html

W1TP: Telegraph Museum
- Articles, and information about telegraphy (morse) and other scientific topics. By Tom Perera.
- http://www.chss.montclair.edu/~pererat/telegraph.html

The Vibroplex Co., Inc.
- Bugs, and paddles manufacturer. In business since 1890. Online sales.
- http://www.vibroplex.com/

Nye-Viking
- Morse Telegraph Keys from Wm M Nye Co.
- http://www.morsex.com/nye/

IZ1CQN
- Check out the key collection.
- http://www.iz1cqn.it/

The Vibroplex Collector's Page
- KN6W, Randy Cole presents information and images for collectors.
- http://www.la.ca.us/frandy/