https://copyright.gov/eco/help-file-types.html
eCO Help - eCO Acceptable File Types | U.S. Copyright Office
eCO Acceptable File Types
file typesecohelpcopyrightoffice
https://governor.wa.gov/file-types-downloads
File types & downloads | Governor Bob Ferguson
file typesdownloadsgovernorbobferguson
https://help.speakerdeck.com/help/what-file-types-do-you-support
What file types do you support?
file typessupport
https://www.textasticapp.com/v10/manual/viewing_editing_files/file_types.html
Supported File Types — Textastic 10.9.2 documentation
supported file typesdocumentation
https://www.shapr3d.com/product/cad-file-types
Import and export native or neutral CAD file types
Explore industry-standard CAD file types supported by Shapr3D, whether you're importing designs from other programs or exporting files for manufacturing.
import and exportfile typesnativeneutralcad
https://daringfireball.net/2004/02/setting_empty_file_and_creator_types
Daring Fireball: Setting Empty File and Creator Types
OK, so yesterday I demonstrated how to set HFS file and creator types using AppleScript, Perl, and shell scripts. But what if you don’t want to *set* the...
daring fireballsettingemptyfilecreator