"High-tech" has different definitions given by many units domestically and abroad. The Organization for Economic Co-operation Development (OPED) defines the industries in aerospace, pharmaceuticals, computers and office machinery, communication equipment, and scientific instruments as high-tech industries. The Council for Economic Planning & Developing (CEPD) of Taiwan Executive Yuan classifies the high-tech industries into 6 categories. The 6 categories consist of integrated circuits, optoelectronics, biotechnology, telecommunications, precision machinery, and computer & peripherals. There are various definitions for high-tech. High-Tech defined in this paper includes, but is not limited to, the advanced science technologies applied in the fields of microelectronics, optoelectronics, precision equipment, telecommunication, nanotech, pharmaceutics, biotech, medical devices, animal experiment, aviation, and aerospace.  

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Combining the definitions of all parties, the definition of high-tech industries includes microelectronics, optoelectronics, precision instruments, electronic communications, nanotechnology, pharmaceutical preparation, microbiological research, medical equipment, animal experiments, aerospace technology, and other industries. To sum up, the science and technology required in the high-tech industry are high-tech.