What is the difference between HRIS, HRMS, and HR software?

These terms are often used interchangeably. An HRIS (Human Resource Information System) focuses on storing and managing employee data. An HRMS (Human Resource Management System) typically includes payroll processing and broader HR operations. "HR software" is the general term for any platform that automates people management tasks. In practice, most modern platforms marketed as HRIS or HRMS in Singapore cover both data management and operational HR functions.