The First Beep at the Grocery Store
Every time you visit a grocery store, you hear a familiar sound: beep, beep, beep. A cashier glides a box of cereal across a glass window, a bright red light flashes, and the register instantly knows what is in the cart. Today, we take this quick process for granted. However, before the summer of 1974, buying groceries was much slower. Cashiers had to read small paper price stickers on every single can and box, then punch the numbers into a register by hand. Lines moved slowly, and stores frequently made mistakes on receipts.
All of that began to change on the morning of June 26, 1974, in the small town of Troy, Ohio. At a local supermarket, a customer placed a ten-pack of chewing gum on the conveyor belt. The cashier slid the pack across a glass plate built into the counter. Beneath the glass, a laser beam swept across a pattern of black bars and white spaces. A small computer chimed with a clear beep, and sixty-seven cents appeared on the register screen. It was the very first time a Universal Product Code, commonly called a UPC barcode, was officially scanned in a retail store.
- misconception:
- A false idea or belief based on incorrect information.
- identification:
- A way to recognize and name a specific person or object.
- sensor:
- A device that detects physical signals, like light or heat, and reacts to them.
- database:
- A structured collection of data stored in a computer system.
- inventory:
- The complete stock of items and goods kept by a business.
- breakthrough:
- An important discovery or development that helps solve a major problem.
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Preview questions from this passageShowHide
- 1How did cashiers ring up groceries before barcodes were introduced in 1974?
- 2Where and when did the very first official retail barcode scan happen?
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About this explanatory article passage for 4th Grade
“The First Beep at the Grocery Store” is a explanatory article reading passage about History and Science of the Barcode, written for 4th Grade. It takes about 3 minutes to read (436 words) and comes with an interactive quiz and a printable worksheet with comprehension questions and an answer key.