DateDecode (For PalmOS) - Version 1.0 Do you like going like car auctions, garage sales or antique auctions? Are you a car enthusiast that would like to know more about a car from the VIN Number? If so, this powerful program helps you to determine the age of an item. DateDecode includes three tools for determining the age and a built-in database for recording the items you have found. Those tools are: a VIN Decoder, Patent Decoder and Roman numeral converter.