Compilation and provision of an online employee database; compilation and provision of an online database by which prospective employees and contractors can advertise their availability and suitability for work placement; online promotion on a computer network of prospective candidates for employment and other engagement; classified advertising; job placement services; placing of advertisements for others, including job candidates; recruitment, personnel, vocational guidance (employment advice and information); employment and career management services including the provision of information relating to the aforesaid services via an electronic communication network