Computers also handle travel reservations, relay telephone messages, keep track of birthdays and anniversaries, compute taxes and even figure the monthly bills for electricity, water, telephone and other utilities. Not every family has its private computer. Many families reserve time on a city or regional computer to serve their needs. The machine tallies up its own services and submits a bill, just as it does with other utilities.

Money has all but disappeared. Employers deposit salary checks directly into their employees’ accounts. Credit cards are used for paying all bills. Each time you buy something, the card’s number is fed into the store’s computer station. A master computer then deducts the charge from your bank balance.