Refers to knowledge, skills and abilities, often used in the context of the KSAs candidates need to perform a job role. KSAs are often outlined in the job description in both the personal qualities required and the professional qualities required.
Many job applications will ask candidates to show, in a few hundred words, how their knowledge, skills and abilities relate to the requirements of the job.
United States Federal Job Openings previously required applicants to provide narratives on their knowledge, skills and abilities and how they apply to the job in question, until the Office of Personal Management asked federal agencies to phase this requirement out.
KSA occasionally refers to knowledge, skills and attitudes.