The document outlines various types of surgery, including definitions, purposes, and classifications based on planning, risk, and technique. It details categories of surgery such as elective, urgent, emergency, major, and minor surgeries, and lists specific procedures in areas like cardiovascular, respiratory, neuromuscular, ophthalmic, ENT, gastrointestinal, urological, and obstetric & gynecological systems. The author is Mr. Harshad Khade, an expert in medical technology from Symbiosis International University, Pune.