Compilation, storage, analysis, sorting and matching, retrieval and provision of information; interactive database information services; providing access to and leasing access time to computer databases; provision of information to and secured platform for third parties through use of the internet or on-line from a computer database; authentication services which identify and certify users accessing to a computer network as being registered; computer system analysis; computer programming; recovery of computer or electronic data; providing on-line publications, catalogues and pamphlets; computer services.