At the supermarket

1
At the supermarket
2
Bar codes

• The striped pattern is code for a number.
• The number is scanned and sent to a computer in
  the shop's office.
• The computer sends a message back saying what
  product it is, what size it is and its price.
• The price itself is not in the barcode because
  it changes from day to day and shop to shop.
• If the machine cannot read the barcode, the
  assistant types in the number.

3
Electronic Points of Sale

• Every checkout is a computer.
• They are called Electronic Points of Sale
  (EPOS)?
• They give itemized receipts (the name of each
  item is on it).
• They add up the total.
• They automatically take off any discounts.
• They take away the amount sold from the shop's
  stock level automatically.

4
Self Scanning

• Some supermarkets give those customers with store
  accounts a bar code scanner they can use
  themselves.
• They scan things themselves as they put them in
  their trolley.
• This means they do not have to go through the
  normal checkout. Much quicker.
• But what is the problem for the supermarket?

5
Electronic Fund Transfer (EFT)?

• You don't have to use cash!
• Your bank card is scanned.
• You enter your security number (PIN)?
• The supermarket is then allowed to take that
  amount of money straight from your bank account.
  Easy!
• But don't tell anyone your PIN!

6
Stock Control

• So the EPOS counts the things that are sold
  automatically.
• If the number of an item gets too low, the main
  computer automatically sends an e-mail to the
  warehouse.
• The first thing the workers know that they are
  out of stock is when the delivery lorry arrives!
• Some workers have small hand scanners to make
  sure the shelves are never empty.

7
Loyalty Cards

• Regular customers can apply for a card.
• The customer gets prizes, discounts and
  information about special offers.
• The supermarket finds out about the customers
  views and needs and can send publicity to them.