Industrial gases are crucial in modern industry, with almost no branch of industrial processing untouched by them. More than one million tons of industrial gases is used every day, yet few people know how they are manufactured or used. This text reviews the preparation and applications of the main industrial gases, highlighting the chemistry, technology and engineering processes utilized in their manufacture transport and use. It should be of interest to technical and commercial managers; research workers and engineers in the gas production and supply industries; research scientists and engineers in the gas using industries.