Accounting; auditing; business and statistical information; business management and administration; business appraisals, investigations and inquiries; business management assistance; business management and organization consultancy; commercial or industrial management assistance; business research; cost-price analysis; marketing research and studies; statement of accounts, payroll and tax preparation; telephone answering; computerised file management; compilation and systemisation of information into computer databases; arranging exchanges between buyers and sellers; exporting services (purchasing and exporting goods for others); import-export agencies; oil and gas lease administration; personnel recruitment; advertising and publicity; marketing and promotional services; retailing and wholesaling services; buying and selling services supplied by way of a global computer network