Introduces blueprint symbols and their meaning as used in a manufacturing operation. Provides instruction and practice to develop skill in spatial visualization, sketching, orthographic projection, including auxiliary and sectional views, detail and assembly drawings, dimensioning and tolerances, title blocks, material lists, and notes for use by various manufacturing personnel and American National Standards Institute (ANSI) conventional drafting and dimensional standards. Credit may be earned in DRF 121 or SKDR 101 but not both.