Archive for the ‘Just for Fun’ Category
The secret Barcode Check Digit – how it’s calculated
Most people know that the last digit of a barcode is a “check digit” used by the scanner to check whether it read the barcode correctly. It does this by adding up and multiplying the numbers it gets from the bars. The secret formula for the last digit is:
How CDs are made YouTube video
Fascinating video on YouTube about how CDs are made.