This document provides an introduction to biotechnology. It defines biotechnology as the application of scientific principles to processing materials using biological agents to provide goods and services. Biotechnology is a multidisciplinary field that incorporates various areas of science. The document outlines the history of biotechnology from ancient uses of microorganisms in food production to modern applications of genetic engineering. It also describes various biotechnology techniques such as genetic engineering, tissue culture, and polymerase chain reaction. The industries and applications of biotechnology are diverse, ranging from medicine to agriculture to environmental uses.