ATS stands for Applicant Tracking System.
Similar to a CMS, an ATS is a web platform and software for easily posting jobs and tracking the process from application to hire. Most popular ATS’s also integrate into other functions, whether it being 3rd party job boards or CRM systems.
Applicant Tracking Systems can range from company size and industry, but in general the most popular ATS’s include:
Source: Ongig List of Most Popular ATS