Radio
Radio - from World Book Online
How Radio Works - from How Stuff Works
Rotary Telephone
How Telephones Work - from How Stuff Works
Vinyl Record Player
How Record Players Work - from How Stuff Works
Cassette Tape
Cassette / Tape Recorder - from World Book Online
How Tape Recorders Work- from How Stuff Works
CD/DVD Player
Compact Disc - from World Book Online
When were CDs Invented and How do They Work - from World Book Online
How DVD Players Work- from How Stuff Works
Tube Amplifier
How Amplifiers Work - from How Stuff Works
Cathode Ray Tube TV
Television / scroll down to Cathode Ray Tube screens - from World Book Online
How Television Works - from How Stuff Works
Nintendo Entertainment System (NES)
Nintendo Entertainment System (NES) - from World Book Online
Beeper / Pager
Pager - from World Book Online
What is a Pager - from How Stuff Works
Dial Up Modem
Broadband Communication / Dial Up Modem - from World Book Online
How Modems Work - from How Stuff Works
Best of What's New - from Popular Science, Scroll down for category links
The editors of Popular Science pick the year's top 100 innovations in the worlds of gadgets, aviation, engineering, health, and beyond.
The Best Inventions of 2023 - from Time Magazine
200 Innovations Changing the Way We Live
Top 10 Emerging Technologies of 2015 - from Scientific American
10 Top Inventions of 2011 - from Popular Science as reported by MSNBC
50 Best Inventions of 2010 - from Time Magazine
101 Gadgets that Changed the World - from Popular Mechanics
110 Predictions for the Next 110 Years - from Popular Mechanics