1. A method for improving network efficiency of document transmission from a content server to a user, comprising the steps of: (a) at a condenser located between a content server and a user connected to said content server over a network: (i) receiving a user's request for a document, (ii) said requested document being referencable with respect to a base document associated with a class; (b) automatically obtaining said class; (c) automatically obtaining said base document associated with said class; (d) creating a condensed document by abbreviating redundancy in said requested document relative to said base document; and (e) transmitting said condensed document to said user to enable said user to reconstruct said requested document.