There is traffic everywhere ~ on week ends and on festival days, so many people are travelling – at every toll-plaza there are long winding queues and some try to outwit others by jumping lanes and creating chaos ! .. .. RFID is in news ..Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. The tags contain electronically stored information.
Science and technology have changed the way people shopped. Gone are the days when you waited patiently in your neighbourhood grocery shop – the man loudly repeating every item you ordered and then writing a slip of paper the values to be paid ! .. now you push a cart around, pick-up all wanted & unwanted – at the counter, scanner will read the barcodes, there would be a beep sound, billing happens ~ in the end, one would never know – what was billed, how much one had to pay, and what was the discount bragged about ! A life without barcodes is hard to imagine now. But it wasn’t that long ago, and the story doesn’t start with George Laurer. It starts with an engineer named Joseph Woodland. In 1948 Woodland was trying to come up with simple symbol that, when scanned, would translate to a number that a computer could use to identify a product. A barcode (also spelled bar code) is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths and spacings of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called barcode readers. Later, two-dimensional (2D) variants were developed. 2D barcodes can be read or deconstructed using application software on mobile devices with inbuilt cameras, such as smartphones.Would you know that manually reading a barcode too is possible, but only when one understand that the 12 numbers represent. The row of numbers found on a barcode is known as the Global Trade Item Number (GTIN).
While a barcode only holds information in the horizontal direction, a QR code does hold information in both horizontal and vertical directions. Due to this, a QR code holds hundreds of times more information than a barcode. The tale of the barcode's invention begins in 1948, on a beach in Miami. Its inventor, Joseph Woodland, was thinking of Morse code and tracing circles in the sand at the time, reports 99% invisible. But Woodland's patent didn't make much of a splash until 1973. The executives approached 14 companies to come up with a solution. And as it turns out, it was an IBM employee named George Laurer who came up with the final design. The very first barcodes were in the shape of a bulls-eye, though they weren’t called “barcodes” yet. Woodland’s invention was patented in 1952 as a “Classifying Apparatus and Method”. Finally, in 1973, a group of supermarket executives led by Alan Haberman decided they needed to get some kind of scannable symbol in place to move people through checkout lines faster. They laid out a list of specifications that their ideal symbol would have and asked 14 companies, including IBM, to come up with a solution.