Drafters prepare blueprint of technical drawings of building constructions and present it to the builder or contractor. The blueprint enables the builder and contractor to visualize as to how will the final outputs of the project will look. Such drawing provide in depth details of building constructions like dimensions, materials used and the procedures involved. Drafters also use computer aided tools like CADD, Catia, etc. Drafter jobs comprise major part of the recreational activity and can transfer or recollect knowledge from various fields including nature, geography, history, politics, social sciences, space sciences, etc.