Ream - 500 sheets of paper.

Recycling - The series of activities, including collection, separation, and processing, by which products or other materials are recovered from or otherwise diverted from the solid waste stream for use in the form of raw materials in the manufacture of new products.

Register Marks - Cross-hair lines on mechanicals and negatives that guide strippers and printers.

Retouch - To enhance a photo or correct its flaws.

Roman Type - Type with serifs. Also type that is upright (not italic).

Rule - Line used for graphic effect.

Run - Total number of copies ordered or printed.