aeXiv Electrical Engineering and Systems Science
An open access repository of electronic preprints approved for posting after moderation, but not full peer review. It consists of scientific papers in the fields of mathematics, physics, astronomy, electrical engineering, computer science, etc. In many fields of mathematics and physics, almost all scientific papers are self-archived on the arXiv repository.
Aviation Safety Database
Includes many safety databases: NTSB Aviation Accident/Incident Data system, FAA Accident/Incident Data System, Near Midair Collision System, NTSB Safety Recommendations to the FAA with FAA Responses, BTS Statistics, World Aircraft Accident Summary, Aviation Safety Reporting System, Air Registry, NTSB Weather Related Accidents, and Aircraft Type Certificates.
Accident & Incident Data from FAA.gov
Data and reports from documented aircraft incidents.
Aircraft Owners and Pilots Association
Provides links to AOPA magazines, aviation classifieds, flight training information, a flight school database for finding flight schools, and other information.
American Welding Society
Explore membership, certification, advanced training, updated standards, conferences, professional collaborations or the many exciting career opportunities in welding today.