An applicant tracking system (ATS) is a software application that enables the electronic handling of recruitment needs. An ATS can be implemented or accessed online on an enterprise or small business level, depending on the needs of the company. An ATS is very similar to customer relationship management systems,but are designed for recruitment tracking purposes. Almost all recruitment agencies and most major corporations with an in-house recruitment function use some form of applicant tracking system to handle job postings, applicants, resumes, interviews.