22. A computer-implemented method for purchasing information from a server, comprising: delivering, by a document server, to a user of said client logic device user-requested pages of a specific document in a first user-viewable version; protecting, by a security server, said first user-viewable version to permit said user viewing the actual contents of said pages of said specific document and selecting by said user, but not printing, copying, or saving by the user; calculating, by a transaction server, a charge to permit a requested standard operation to be performed on a user-selected portion of said specific document; and delivering, by said document server, to said user a second version of the actual contents of said specific document, said second version consisting of the user-selected portion of said specific document, said delivering step being performed in coordination with said security server upon authorization of payment of the calculated charge, said second version comprising a version on which the standard operation is performed.
22. A computer-implemented method for purchasing information from a server, comprising: delivering, by a document server, to a user of said client logic device user-requested pages of a specific document in a first user-viewable version; protecting, by a security server, said first user-viewable version to permit said user viewing the actual contents of said pages of said specific document and selecting by said user, but not printing, copying, or saving by the user; calculating, by a transaction server, a charge to permit a requested standard operation to be performed on a user-selected portion of said specific document; and delivering, by said document server, to said user a second version of the actual contents of said specific document, said second version consisting of the user-selected portion of said specific document, said delivering step being performed in coordination with said security server upon authorization of payment of the calculated charge, said second version comprising a version on which the standard operation is performed. 35. The method claim 22 , wherein delivering user-requested pages of said specific document further comprises: delivering user-requested page images in the form of low resolution images suitable for viewing and selecting.