Provision of an on-line marketplace for buyers and sellers of goods and services; providing an online marketplace for barter and exchange of goods and services among users via a global computer information network; providing on-line commercial directory information services; promotional services in the nature of providing hyperlinks to websites of others; outsourcing services [business assistance]; outsourcing services in the nature of arranging service contracts for others [business assistance]; personnel management; personnel management consultancy; personnel management advice; personnel placement; personnel recruitment services; personnel selection for others; staff placement services; selection of staff.