Code books refer to manuals or publications that contain information about codes, regulations or laws. Synonyms for code books include the following: rulebook, handbook, guidebook, manual, compendium, directory, almanac, encyclopedia, reference book and catalog. Code books are widely used in various industries for compliance purposes and are important for professional development. They aid in promoting consistency, accuracy and efficiency in the workplace by providing guidance on laws and regulations that govern specific industries. The utilization of code books further increases efficiency and reduces the likelihood of errors, which is essential for various industries, including engineering, construction, and healthcare, to name a few.