34. A search engine apparatus, comprising: a first database containing records relating to a content of a plurality of information resources; a second database of records relating to commercial messages; a memory storing: a persistent identifier and instructions for execution by an automated processor system; the automated processor system, configured to execute the instructions causing the automated processor system to: receive a search query and automatically define in dependence thereon a query of said first database to retrieve hyperlinked identifiers of records of said first database corresponding to said search query, and a selection of records from said second database to define hyperlinked identifiers of records of said second database relating to commercial messages associated with at least one of said search query and said persistent identifier, automatically organize said identifiers of records from said first database together with said identifiers of records from said second database in a common output, in further dependence on said persistent identifier, define a hierarchy from the hyperlinked identifiers of records of said first database corresponding to said search query according to content of or linkage among the hyperlinked identifiers of records of said first database, insert the hyperlinked identifiers of records of said second database relating to commercial messages associated with at least one of said search query and said persistent identifier into the hierarchy according to content of or linkage between the hyperlinked identifiers of records of said second database and the hyperlinked identifiers of records of said first database; and an accounting database, for recording accounting information for at least one of a presentation and a selection of an identifier of a record from said second database with respect to an account maintained by an entity relating to a corresponding commercial message.
34. A search engine apparatus, comprising: a first database containing records relating to a content of a plurality of information resources; a second database of records relating to commercial messages; a memory storing: a persistent identifier and instructions for execution by an automated processor system; the automated processor system, configured to execute the instructions causing the automated processor system to: receive a search query and automatically define in dependence thereon a query of said first database to retrieve hyperlinked identifiers of records of said first database corresponding to said search query, and a selection of records from said second database to define hyperlinked identifiers of records of said second database relating to commercial messages associated with at least one of said search query and said persistent identifier, automatically organize said identifiers of records from said first database together with said identifiers of records from said second database in a common output, in further dependence on said persistent identifier, define a hierarchy from the hyperlinked identifiers of records of said first database corresponding to said search query according to content of or linkage among the hyperlinked identifiers of records of said first database, insert the hyperlinked identifiers of records of said second database relating to commercial messages associated with at least one of said search query and said persistent identifier into the hierarchy according to content of or linkage between the hyperlinked identifiers of records of said second database and the hyperlinked identifiers of records of said first database; and an accounting database, for recording accounting information for at least one of a presentation and a selection of an identifier of a record from said second database with respect to an account maintained by an entity relating to a corresponding commercial message. 45. The search engine apparatus according to claim 34 , wherein said first database is organized taxonomically, wherein the organizational structure of the taxonomy comprises a tree structure displaying at least three hierarchal levels.