| acri.cz | ACRI Association of the Czech Railway Industry |
| permanentwayinstitution.com | Permanent Way Institution |
| french-railway-industry.com | French Railway Industry Association |
| cpisalumni.org | Canadian Pacific Railway Computers and Communications Alumni Association |
| chkpws.org | The China Hong Kong Permanent Way Society |
| aslrra.org | American Short Line and Regional Railroad Association |
| aric.net.au | Australian Railway Industry Corporation |
| aedtf.org | European Association for the Development of Railway Transport |
| aar.org | AAR - Association of American Railroads |
| njshortline.com | New Jersey Shortline Railroad Association |
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