Advertising; on-line advertising on a computer network; providing information, including on-line, about advertising, business management and administration and office functions; agents' services (business management of actors, artists, authors, performing artists, photographers or writers); business management; business management and administration services supporting utilisation of a global computer network; public relations; publication of publicity texts; publicity agencies; publicity columns preparation; publicity material rental; including but not limited public relations services offered via a global computer network