This document discusses different types of business activities. It begins by defining business activity as any economic activity carried out for the purpose of earning profits, such as production, operations, marketing, and administration. It then categorizes business activities based on their functions into industry, commerce, and trade. Industry includes activities like extraction, manufacturing, and construction. Commerce includes domestic and foreign trade as well as wholesale and retail trade. Trade aids like transportation, banking, warehousing, and insurance are also discussed.