A local store was having a huge sale because they were going out of business. It seemed like one of the checkout lanes had customers lined up and were having to wait for such a long time. Some of them only had a few items and it took a long time to check out for them, just like the ones with a lot of items. Nobody could figure out why. Finally the supervisor walked over to her to see what the problem was. It was caused by the barcode scanner that the cashier was using. She was hired part time only, to help out during this big sale. She has very much experience, too. She had never used the barcode scanner that this store used. There are many different barcode scanners. She had used many of them, but this specific barcode scanner was not one that she had used before. It was a hand held one. After her supervisor explained how to use it, the line began moving faster. It ended up being very easy for her. Since she had experience in many stores, her and her boss both just took it for granted that she would know how to use this one. Since there are different kinds, which many have been new to the market, a person should take a test, or make sure they can operate the barcode scanner used, before starting a new job using one.