| nspe.org | National Society of Professional Engineers |
| ieee.org | Institute of Electrical and Electronics Engineers |
| astm.org | ASTM International |
| asse.org | ASSE The American Society of Safety Engineers |
| asme.org | American Society of Mechanical Engineers |
| ashrae.org | American Society of Heating, Refrigerating, and Air-Conditioning Engineers |
| asce.org | American Society of Civil Engineers [ASCE] |
| ansi.org | American National Standards Institute |
| aiche.org | American Institute of Chemical Engineers |
| aiaa.org | American Institute of Aeronautics and Astronautics (AIAA) |
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