- og rumfart

• The Aviation Herald
• Flight Safety Foundation
• Aviation Safety Network
• LH Luftfartssektionen
• EASA Continuing Airwortiness
• EASA Technical Publications
• Technik Museum Speyer, Frankfurt
• OpenSky Network ADS-B Data
• DESCANSO, Deep Space Communications and Navigation Center of Excellence
• SpaceAholic - The site and collection reflects interest areas in he U.S. Manned Space flight program
• NASA's Technical Resource Server
• The European GNSS Agency
• 916 Starfighter, the history of the 916 German Starfighter
• Brilliant.Org, Learn to Think
• Skandinavisk UFO Information