printers are defined by the Bureau of Census' Standard Industrial Classification (SIC) 27. A word of warning about SIC codes might be in order at this time. Anyone who has attempted to use them has no doubt found them to be vague at best and just downright obsolete at worst. SIC 27, Printing, Publishing, and Allied Industries, is unfortunately no exception. While this definition of the printing industry is similar to the PIA's, it doesn't necessarily include firms engaged in fabric and textile printing (largely a screen process), manufacturers of products containing incidental printing or circuit board printers. But, it could. Broad headings and subjective interpretation of various industries leaves the SIC codes open to a great deal of confusion when it comes to actual statistics. It's often difficult to determine what counts under SIC 27 and what doesn't. (Gold Printing)