North American Product Classification System (NAPCS) Canada [Provisional Version 0.1]

• 512 - Internet, software and other computer related services
• 519011 - Internet publishing and broadcasting services

519011.27 - Professional, technical and scholarly books, online

Specialized books published in a digital file which can be accessed or downloaded over the Internet, containing research, advanced knowledge and/or information used by individuals in the practice of specific occupations or professions, e.g. lawyers, doctors, electricians, accountants, business or computer professionals, or aimed at the academic and research community. Includes specialized reference books.