The Commodore Modem/300 (Model 1660) – pagetable.com
Apple IIc 300 baud modem dial up - YouTube
Apple 2 connecting to the net with 1970's acoustic coupler modem and rotary phone - YouTube
300 Baud Master Modem | CommodoreServer.com
Abt Electronics - #TBT: Inspired by today's Net Neutrality ruling, here's a fun look at what it took to get online 30 years ago. This modem would cost $868.69 in 2015 dollars,
Speeds and More Speed - VoIPWatch
Apple Modem 300 Explained - Silicon Features
Modem - Wikipedia
From Baud to Awed: The History of the Modem | Auvik
From Baud to Awed: The History of the Modem | Auvik
Atari 300 Baud Modem | This is my Atari 830 300 Baud Acousti… | Flickr