The use of electronic messaging systems to send unsolicited bulk messages indiscriminately is: ответ на тест 884653 - Английский язык

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Have you got a mobile phone?
Before mobile phones were developed, you could only call someone with a phone which was connected to a phone line. That problem meant that it was often difficult to contact people, particularly if you were on a bus or in a car.
Before mobile phones, people didn’t send text messages to each other. Since they were introduced, text messages have changed the way we communicate. With text messages, you don’t need to actually call someone. You simply type a short message and send it, being careful, of course, to send it to another mobile and not to a home phone.
Mobile phones used to be big and heavy. Now, they’re small and light. The chances are that they will become even smaller and lighter in the future.
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The Morse code simplified sending messages. It was also very fast. With practice, the Morse code can be read at 30 words a minute or more. It became the most widely used code, because it was the easiest to understand and the fastest to transmit. The telegraph meant that at last people could send messages a long way at great speed. Soon people wanted to send messages even farther.

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