All retail as well as wholesale products are labeled with bar codes today. Even the smallest retail items, like chocolates or pencils, have a unique bar code to identify them accurately. Bar codes have specific symbology that is defined in the height and width of the bars as well as the spacing between the bars. Each of these bars might represent only numeric data, alphanumeric data or character data, depending on the type of symbology being used.

Each bar code has a start bar and an end bar to allow the scanner to read the data precisely. Some bar codes have another bar before the end bar, known as the checksum bar code. After the scanner calculates the sum, it is verified with the value of the checksum bar code for accuracy. This ensures exact calculation with minimal errors.

Bar codes are read by bar code scanners, which are photosensors used to convert the bars in the bar code into electrical signals as it is being scanned. Since the bars are distinguished by their width, height and spacing, these are then measured using software that recognizes and converts the electrical signals from the bars into readable characters. The scanner software then transmits this data to the PC terminal. The whole process does not take more than a few seconds, and is a very fast procedure.

The software used to track the bar code is accurate, and keeps precise records of all the bar codes scanned. This ensures that the software itself keeps track of the data relating to all the products sold. Since the software loaded into the computer records the data, the data can be retrieved with no fuss. Also, since the procedure is faster than manually entering the code into the system, it saves time and ensures more work efficiency.

Bar codes are especially useful when taking note of inventory for the annual report. Retailers find scanning the products time-saving and efficient, with fewer chances of errors in the calculations or recording of data. Supermarkets and shopping malls find it very useful to take care of customers needs in less time, rather than make the customers wait in line while cashiers entering the data manually into the PC.

Financial matters are crucial, as even the slightest of problems might give rise to complexities that might take a long time to solve. Medical and surgical fields especially would have a tough time with clerical errors while taking inventory. Using bar code software can eliminate this problem, as the error rate is extremely low.

It is essential for an organization to go in for the best kind of bar code to minimize critical errors and other problems. Bar code scanners and related software are inexpensive compared to the wages paid to clerks. They are long-lasting, easy to use and efficient for all kinds of products.