A Document Card (DocuCard) (101; Fig. 1), suitably constructed for PCMCIA compliance, for storing documents (Fig. 4) and which is "content revealing". The DocuCard is a transportable unit having a nonvolatile storage means (203; Fig.2) for storing information in a digital form, a controt processor (201; Fig. 2) for processing user initiated functions; an I/O port (202; Fig. 2) for interfacing to external devices for reading and writing digital information (Figs 4, 5), and a user interface (601) for allowing a user to directly interact with the DocuCard. The user interface (601) on the DocuCard includes a display (603) for displaying lists of functions (Figs 12-15) and documents (Fig. 17) and information responsive to user invoked functions and a user input elements (606-610) for allowing a user to traverse the lists of functions and documents, as well as information generated responsive to an invoked function. The control processor (210; Fig. 2) of the present invention include features for controlling access to documents stored therein.