A Groqit (grock’et) is pocket-dwelling device that reads and remembers barcode information. It can hold hundreds of thousands of barcodes and related information and do lookups in seconds.
You use it at home to compile and store barcode numbers from your music, video, book and other personal collections, then bring it with you when you go shopping. It can be used to read barcodes (UPC or EAN) of books, DVD’s, games and so on, which it then compares to its stored lists of what you already have. It tells you whether or not the barcode you have just read is something you already own.