This document discusses human resource outsourcing (HRO). It begins by explaining that most organizations outsource HR services to reduce costs and focus on core business functions. Common outsourced HR services include payroll processing, benefits administration, and recruiting. The document then examines the reasons for HRO, including freeing up internal staff to focus on strategic work and gaining expertise. It also outlines the types of organizations that provide outsourced HR services - human resources organizations, professional employer organizations, and administrative services organizations.