This category lists companies in Bolton that produce products from raw materials and the companies that support them, such as distributors, wholesalers, industrial supply companies and manufacturing representatives. The general types of companies listed here are food processing, aviation, conveyors, electronic, guns, instrumentation, mining, drilling, chemicals and textiles; however, the list is not limited to these industries. Companies in industries that have a separate sub-category in Business and Economy are not listed here. Examples of companies not listed here are agriculture, automotive, computers, home and garden, oil and gas, printing, publishing, and telecommunications.