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　　Do you ever call long distance from a pay phone?

　　You dial the number, and then you hear something like: “sixty cents, please. Please deposit(投硬币)sixty cents 1　　 the first three minutes.”

　　If you are placing the call in New York State, don’t try to ask the operator a question. There is no one on the 2　　with you. The voice you hear comes from a computer. It has vocabulary of sever words in its memory. This program is known 3 the Auto mastic Coin Telephone Service.

　　The words and numbers are first recorded, each word and number by itself, by an actress. The sounds are then changed　　4　　electronic signals and　　5　　in a computer memory circuit(电路). The circuit is hooked(连接)into the computer that controls all the calls made from pay 6 .

　　While you 7 your call, the computer senses each of the numbers. When you finish, it calculates the cost, and produces the voice that you hear. As soon as you deposit the 8 , the computer automatically connects you call.

　　Have you ever called information and heard and operator 9 : “Information. 10 I help you?”

　　You tell the operator a name and he 11 she gives you the phone number. 12 the past, the operator would have to thumb(翻阅)through the telephone directory(电话号码簿)to 13　　up the number. Now, a new computer system provides this information　　14 more quickly. Sometimes it can find the number even if you misspell the name.

　　Information operators 15 use this new system type in the name you give on tee computer terminal. In a flash, the computer displays the name and telephone number 16 the CRT(显像管). At the same time, the computer calls up nine similar names. In case you spelled the name 17 ,the operator may still be able to find.

　　All new phones are also entered 18 this computer system. The information operators, therefore, have the up-to-the-minute listing. At the end of the year, the computer is hooked to a machine 19 automatically sets the type for the new telephone 20 . The directory is then printed from this type accurately(准确的),quickly , and at a great savings in cost.

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