The Silicon Jungle by David H. Rothman

example, you can enter that your customer wants 47 of your code number W889AA (widgets), two entries; and InfoStar can look up the price of widgets, multiply that by 47, look up the sales tax for the state you inputted earlier, multiply your subtotal by the amount of sales tax, and all by itself enter the name of the product, the subtotal, the amount of the sales tax, and the total—zip-zip-zip-zip, four entries, all done by the computer rather than by you and all done in a flash. The first time I tried it, I was startled into yelling, “Wa-hoo!”