Abstract: A system and method that accepts material from the Internet, computes and maintains a computationally unique representation of the received material in a database, computes a computationally unique representation of the updated database state as a whole, publishes material and database representations in various forms for the global Internet audience to witness, and returns a time stamped attestation to the submitter of material as proof of the material being witnessed on the Internet along with unique database state and revenue generating advertisements. Published representations may include pictures, common words, or hexadecimal character string to facilitate Internet searching mechanisms.

Abstract: An Instrument Flight Rules (IFR) Training Device for use during aircraft pilot training in conjunction with a headset having a pair of earphones supported by earphone stirrups. In its most preferred embodiment, the training device includes, at least, a mask member for partially occluding a pilot's vision, two arm members extending rearwardly from connections with opposing sides of the mask member, and headset connecting clamps for pivotally connecting the arm members to the headset stirrups, wherein the training device is supported by the headset and movable to a location up and away from a pilot's primary field of vision.