An applicant tracking system (ATS) is software that facilitates the hiring and recruitment process, including job postings and applications. It aggregates and makes searchable information about job searchers. An applicant tracking system, or ATS, keeps track of candidates throughout the employment process. A software application that enables the electronic processing of recruiting and hiring needs is known as an applicant tracking system. Depending on the demands of the organization, an ATS can be built or accessed online at the corporate or small-business level; free and open-source ATS software is also available.