Business process outsourcing (BPO) is the contracting of non-primary business activities and functions to a third-party provider. BPO services include payroll, human resources (HR), accounting and customer/call center relations. BPO is also known as Information Technology Enabled Services (ITES). Often the business processes are information technology -based and are referred to as ITES-BPO, where ITES stands for Information Technology Enabled Service. Knowledge process outsourcing (KPO) and legal process outsourcing (LPO) are some of the sub-segments of the business process outsourcing industry.