In which field is offset lithography primarily used?

Offset lithography is primarily recognized for its significant role in book printing. This traditional printing technique involves transferring ink from a plate to a rubber blanket and then onto the printing surface, allowing for high-quality reproduction of text and images. This method is particularly favored in the publishing industry due to its efficiency in producing large volumes of printed material with consistent quality.

In contrast, while graphic design incorporates various techniques that may use offset lithography, it is more of an application of design principles rather than a direct use of the printing process itself. Digital communication does not pertain to offset lithography, as this field centers around electronic methods of information transfer rather than printing. Computer programming is also unrelated, focusing instead on building software and coding, with no involvement in the physical printing processes that offset lithography entails. Thus, the strong association of offset lithography with book printing makes it the most accurate choice.