This document discusses the definition of "industry" under the Industrial Dispute Act. It defines industry as any business, trade, undertaking, manufacturer or calling of employees. It also lays out a triple test established by the Supreme Court to determine what constitutes an industry: 1) there must be systematic activity, 2) the activity must be organized, and 3) the activity must be for the production and/or distribution of goods or services to satisfy human needs. Several court cases are discussed that apply this test to different sectors such as hospitals, educational institutions, clubs, and temples.