Comment by esprehn

It's not that obscure, it's the technical term for the management software in the recruitment and hiring space and the term predates the modern AI craze by over a decade (or more?):

https://en.m.wikipedia.org/wiki/Applicant_tracking_system

https://www.oracle.com/human-capital-management/recruiting/w...

https://www.greenhouse.com/resources/glossary/what-is-an-app...