This document provides an overview of human resource accounting. It discusses the development of human resource accounting concepts over time, beginning with early attempts in the 17th century to assign monetary value to human assets. It then outlines some of the key models and approaches that have been used historically, including the historical cost approach developed by RG Barry Corporation in 1967. The document also discusses the importance of properly valuing human resources as key organizational assets and the need for accounting standards to reflect this value. Overall, the document provides a concise history of the field of human resource accounting and highlights its goal of assigning monetary values to employee knowledge, skills, and contributions.