Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A millwright is a craftsman or tradesman engaged with the construction and maintenance of machinery. Early millwrights were specialist carpenters who erected machines used in agriculture, food processing and processing lumber and paper. In the early part of the Industrial Revolution, their skills were pressed into service building the earliest powered textile mills. Modern millwrights work with steel and other materials in addition to wood and must often combine the skills of several skilled trades in order to successfully fabricate industrial machinery or to assemble machines from pre-fabricated parts. The modern millwright must also be able to read blueprints and other schematics to aid him in the construction of complex systems. Millwrights are frequently unionized, although experienced millwrights often set themselves up as independent contractors.