 Billback systems track usage from concert halls to toothpicks, add the costs up, divide it all out, and calculate the price per usage by hours, minutes, seconds, pieces, visits, clicks, views etc.Computerized billback systems are useful for occasions that were traditionally difficult to keep track of and where costs were covered with a blanket revenue.By tracking usage, running costs of equipment such as copy machines and phones can be precisely attributed, and their initial costs may be recovered with more certainty.