Query4All.com
Index of files ...
Data generated from past analysis.
http://piketty.pse.ens.fr/files/
https://www.oreilly.com/library/view/access-database-design/1565926269/ch03s05.html
https://support.microsoft.com/en-us/windows/search-indexing-in-windows-10-faq-da061c83-af6b-095c-0f7a-4dfecda4d15a
https://www.microfocus.com/documentation/visual-cobol/vc50/EclWin/HRFLRHFILE0A.html
https://www.mhcautomation.com/blog/document-indexing-basics/
https://www.luigisbox.com/search-glossary/index-file/
http://www.matisse.net/files/
https://en.wikipedia.org/wiki/Indexed_file
https://www.cput.ac.za/files/
https://doc.laserfiche.com/laserfiche.documentation/11/administration/en-us/Subsystems/LFAdmin/Content/Search_Index_Files.htm