ERP is usually used by large companies. ERP is an ecosystem in which there are several modules in it, including: Financial, BI, CRM, Manufacturing, Supply Chain (Logistic), Human Capital, and many others.
The main purpose of ERP is to increase organizational efficiency of an organization by managing and improving how company resources are utilized. Improving and/or reducing the number of resources necessary without sacrificing quality and performance are keys to effectively improving business growth and profitability.
SAP (paid)
JD Edwards by Oracle (paid)
NetSuite by Oracle (paid)
Microsoft Dynamics 365 (paid)
ERPNext (open source but require technical skill)
Human Resource Management System (HRMS)
For Managing People, Automatic Payroll, Recruiting, Workforce, Attendance and others. HRMS and human resources (HR) solutions evolved into a more data-management focused HRIS (Human Resource Information System) which then led to today's more complete and strategic, employee-focused HCM (Human Capital Management). HCM is usually implemented by large company.