Point of sale machines
One of the things that I think is so marvelous about living in this technological age is how quickly technology is evolving. I can remember when I was a young child, going to the store and having the old fashioned cash registers at the check-out counters. The cashier had to punch in the codes and prices manually. Now with modern technology, the cashier just has to use something like a PSC Powerscan bar code scanner to ring up the purchase; all the cashier has to do is make sure that the bar code is passed over the scanner!
That certainly lessens the human error side of incorrect charges. Of course, the data has to be input correctly in the first place; as “they” like to say “garbage in, garbage out!” And that is certainly true with electronics and computers!