A handbook of circulars is a collection of circulars, which are documents that provide information on a specific topic. Circulars are often used by businesses, organizations, and government agencies to communicate with their employees, customers, or stakeholders. A handbook of circulars may include circulars on topics such as company policies, procedures, guidelines, announcements, news, events, or educational materials. The purpose of a handbook of circulars is to provide relevant information and updates to the intended audience in a systematic and easily accessible manner.