The first thing ever scanned was chewing gum
On a June morning in 1974, in a supermarket in Ohio, a CASHIER passed a ten-pack of chewing gum over a new glass window in the counter. It beeped. That was the first commercial BARCODE scan, and the packet is now in a museum.
The idea was much older. One of its inventors had been trying to work out how to encode a price, sat on a beach, and idly drew Morse code dots and dashes in the sand — then dragged his fingers downwards to stretch them into lines. That is where the stripes actually came from.
A beep that does five jobs
Scanning a BARCODE does far more than fetch a price. It subtracts the item from stock, updates what the shop knows it has sold today, contributes to the order that will be placed tonight, feeds the sales figures the MANAGER is judged on, and prints a line on your RECEIPT.
That is why a modern shop can run on thin margins with the right amount of bread on the shelf at four in the afternoon. The STOCKER filling the AISLE is working from a list that the CHECKOUT generated while everybody was asleep.
Some counters need years of training
Plenty of shop roles are learned in a week. Some take considerably longer. A PHARMACIST spends five years qualifying and can refuse to hand over a prescription if something looks wrong. A BUTCHER learns to take a carcass apart into the right cuts without wasting any of it. A FLORIST knows how to condition flowers so they open on the right day rather than the day before.
The TAILOR, the JEWELLER and the BAKER all sit in the same category: people running a skilled trade from behind a counter, who happen also to be doing the selling.
Where most people start
Retail is one of the largest private employers in most countries, and for a great many people it is the first job they ever have. The reason is that a sales ASSISTANT or CASHIER can be trained quickly, and the shifts fit around school and study.
What they learn there tends to stick: how to be polite to somebody who is being unreasonable, how to work a till accurately while a queue builds, how to ask a CUSTOMER what they actually need rather than what they asked for. Those are not small skills, and every later job wants them.
The shop that watches itself
Self-service tills moved part of the job onto the shopper, and shops discovered the cost: more mistakes, more losses, and a machine that announces an unexpected item in the bagging area to an entire queue. Most chains now keep staffed lanes alongside, because plenty of customers prefer a person, and because one ASSISTANT can rescue six machines at once.
The GREETER at the door of a big store has a double purpose too — genuinely welcoming, and also a quiet deterrent. A shop is a building designed to encourage strangers to pick things up and carry them about, which requires more thought than it appears to.