There are many mysteries of bar codes. This will help you tame yourself in your cage by helping you understand them.
First, what about the mythical Barcode Beast? The last book of the Christian Bible, called Revelation, depicts the symbols as a sign of the end of the world and tells of a creature who has a sign of it. In many translations, this mark will be number 666 (AKA number of beast). Some people are convinced that all UPC bar codes contain this number. This is not really the case.
The only elements that appear in all UPC bar codes are "product lists." The left and right guards consist of three bars, the center of five. Since all figures in UPC are coded by four bars, these product lists are not numbers at all. So, unfortunately, but no 666 Beast has taken over your kitchen.
However, it looks like bar codes mark everything in the kitchen and grocery stores even use them to produce now. This would make them ideal to track your stock. At least, it seems so.
So why not just go out and get a string sticker?
It's not as standard as you might think at first glance. There are some problems that work with food products. UPC codes are limited to prepackaged, canned or bottled products. Fresh produce, meat and salad items rarely use standard code. Producers may not have any identifier at all. Meat and other items sold by weight will often have custom barrels printed for each package. The first part of the code might tell you what's in the package, but the second part will probably be priced based on the weight. Many stores will place a special UPC on an item that tells you nothing more than the item is in sale for $ 3.99!
Bar codes labeled with glass or printed on clear plastic are extremely difficult to read and cheap barcode readers are having trouble printing a small print code. You have seen all unscheduled checkboxes in the code because their expensive laser fails to work with bar codes.
Another problem is a clean number of similar items as the average supermarket. Next time you're in a store, count the many different types of tomato paste. THAN, count the number of different sizes and brands.
What can a barcode tell you?
UPC has two main components, one part tells you who did it and the other part is assigned by the manufacturer. You could have 10 12-eyed can of Tuna Hunt at home, but getting a bar code does not help much if you are watching "Contadina Tomato Paste 6 oz" that are on sale. In order to be successful, a home network that uses barcodes should be either translate each barcode into something you can read or cross-cross all possible barcodes for similar products. There are products available that can be done first, but the second process is fundamentally impossible.
The next piece of puzzle is how are things sold in groups (like eggs) or in bulk (like wheat)? Or worse, the amount of items you pour into a can (like dry pasta) and throw away the bag or box away. What do you scan when you need more?
What about closing dates? There is nothing in UPC to give you a clue. Scanning items in the home makes sense if the item is something you collect or rent, like DVD or books, because each one is unique and you are unlawful to have more than one. But the food comes in too many shapes and types to scan to be very useful in the kitchen, unless you set up your own system, so you know exactly what is and is not in contact with the corresponding items. To a limited extent this will work.
What portable barcode reader can do for you.
On the other hand, a compact barcode marker can be very useful for watching books, DVDs (what you own and what you rent), toys (like hot bikes), music and comics. Related to a page that allows you, your relatives and friends to build preferences and inventions, it can be very useful for giving or monitoring what you have loved to people.
Many companies have tried to build bar-based food management, even going as far as possible to use web-enabled barcode-reading fridge! None of these efforts gained much. We suspect they were designed by people who have only beer and corn chips in the kitchen.
Source by David Schlinkert