042 — Class 42 includes mainly services provided by persons, individually or collectively, in relation to the theoretical and practical aspects of complex fields of activities; such services are provided by members of professions such as chemists, physicists, engineers, computer programmers, etc.

035 — Class 35 includes mainly services rendered by persons or organizations principally with the object of: 1. help in the working or management of a commercial undertaking, or 2. help in the management of the business affairs or commercial functions of an industrial or commercial enterprise, as well as services rendered by advertising establishments primarily undertaking communications to the public, declarations or announcements by all means of diffusion and concerning all kinds of goods or services.

039 — Class 39 includes mainly services for the transport of people, animals or goods from one place to another (by rail, road, water, air or pipeline) and services necessarily connected with such transport, as well as services relating to the storing of goods in a warehouse or other building for their preservation or guarding.

041 — Class 41 covers mainly services rendered by persons or institutions in the development of the mental faculties of persons or animals, as well as services intended to entertain or to engage the attention.