System for selectively and automatically compressing and decompressing data and enabling compressed data to be rendered in a pseudo-native form

A system for selectively and automatically compressing and decompressing data in a manner such that the data file can be rendered in a pseudo-native form and such that a rendering application program can be invoked by the system includes a first computer-based device having software thereon for determining whether a data file is one of a native uncompressed form and compressed form upon one of attaching, detaching, receiving, rendering and accessing the data file. Software compresses the native uncompressed form of the data into an attachment, and software for enhancingly renders the attachment to a viewer in a pseudo-native form, wherein the attachment remains compressed and is rendered to appear as being in a native-uncompressed form.