A Justifications

1. Broadcast (Scarcity)

• National Association of Broadcasters (NAB)
• NAB FAQ (always recognize the source of data)
  
• FCC, Radio Spectrum Homepage
• FCC, How to Apply for a Broadcast Station
• FCC, directory of forms (look for application forms for broadcast stations)
• NTIA, Spectrum Management Policy
• NTIA, U.S. National Spectrum Requirements

• Fessenden's work @ NE Wireless and Steam Museum (first musical radio braodcast)
  
• Timeline of audio formats @ gizmodo.com :: cached version

2. Telephony (Common Carriage)

• AT&T technology chronology
• United States Telecom Association (USTA) (local exchange carrier industry associa-tion)
• Bell’s Path to the Telephone
• Mike Sandman, Telephony History Pages
• Telephony Museum
  
• California PUC, Telecom Industry page (telephony)
• New York City, Office of Franchise Administration and Planning (Public Pay Telephone Franchises)
• Public Service Commission of Utah, Telecommunications

3. Cable Television (Medium Scarcity)

• National Cable Television Association
• Cable Labs
• California Cable Television Association
• American Cable Association (small cable operators)
• TV Guide (to see cable channels in your area)
  
• National Association of Telecommunications Officers and Advisors (NATAO)
• Los Angeles ITA (cable franchising authority)
  • Cable Franchise Maps of Los Angeles
• City of St. Paul Cable Franchise Application
• Palo Alto Cable Franchise Agreement (with Cablevision)
• Seattle Office of Cable Communications
• Citizen’s Guide to Cable Franchise Negotiations @ Center for Digital Democracy

4. Mobile Telephony (zoning)

• History of Mobile Telephony @ private-line.com
• Timeline of Analog Cellphone @ gizmodo.com :: cached copy
• Mobiledia, cell phone tower search
• What's a COW (cell tower on wheels) video

Other

• Open Video Systems :| FCC page on recent certifications