Telephones help people speak to one another when they are apart. For more than a hundred years, nearly every telephone was a landline. A landline telephone is one that needs to be connected by a wire to a network of other telephones. Because of the wires, people could not take those telephones with them when they left their homes or offices.

What if you had to make a call while you were away from home? You had to find a pay phone. Paỵphones are landlines found in public places. Many pay phones are on the Street. You can make a call from inside a glass or metal space called a phone booth. Once you are inside the booth, you put coins into a Slot in the phone to make a call.

Telephones have seen a lot of progress. Today, many people carry cell phones. Cell phones do not need to be connected with wires. They can be used almost anywhere and can fit in an adult’s hand.

Many cell phones sold today are smart phones. A smart phone is a cell phone that has lots of computer-style features. For example, people use smart phones to check e-mail and go on the Internet. And all that can be done using something small enough to carry in a pocket!

What might be a reason that cell phones were invented?

What is the main idea of this article?

What might be a reason that cell phones were invented?

Pay phones are probably not used as much today as they were in the past. What piece of evidence supports this conclusion?

The article describes an example of a landline. What is an example of a landline?

What is a landline telephone?

What is a landline telephone?

The Internet holds about 5 million terabytes of data. That’s about the same as 1 million human brains. According to experts, there are about 2 billion Internet users in the world. 70% of people in developed countries go online, but only 20% of people in developing countries can access to the Internet.

The average Internet user has 25 online accounts and logs in 8 times a day. 30% of Internet users have just 1 password for all their online accounts, and the most common password is “password1”. About 55% of users choose words which have some personal meaning, and 15% write down both their password and username.

Many people use Wi-Fi hotspots in public places, such as café, airports and hotels. 46% of them are worried about viruses and hackers. Many people type in personal information while using public Wi-Fi: 22% regularly type in email passwords, 21% log onto Facebook and 8% do online banking, but they are unaware about how to be totally secure.

The first computer virus appeared in 1981. The first virus to affect mobile phones appeared in 2005. And the first anti-virus software came out in 1990. There are now about 6,000 new computer viruses every month.

87% of Internet users go online with their smartphone at least once a day. About 80% keep their smartphone turned on 24-7 and 23% use it during mealtimes.

500,000,000 people in the world have a Facebook account – that’s about one in every 13 people. The average user has 130 “friends”, and 48% of adults check their Facebook page as soon as they wake up in the morning. Every 20 minutes, Facebook users around the world upload 2,716,000 photos.

Note: mind-blowing (adj) = extremely exciting or surprising (làm cho mê mẩn, sửng sờ)