What science and technology have improved people's lives?

SMS: The air is full of “little notes”? The popularity of SMS only happened in the past few years. In 1993, the earliest text messages appeared, of course in English. Chinese text messaging did not appear until 1995. However, the SMS functions and services of mobile phones at that time were not perfect. After 1998, SMS services became increasingly mature, and a "big siege" of SMS began. Nowadays, text messaging has become an integral part of personal life from a small perspective. For many people, they no longer write letters and make phone calls during holidays, and students no longer pass notes in class but instead send text messages... Text messages have changed the way many people communicate; text messages are also used to participate in radio and television broadcasts. programs, subscribe to daily instant news or stock information... SMS also provides another way to participate in social life. From a large perspective, text messaging has become a huge industry. I recently saw a statistic that said that Chinese people sent 90 billion text messages in the past year. Based on the 200 million mobile phone users in our country, this means that each mobile phone user sends an average of 450 text messages a year. It also means that industries such as telecommunications have gained more than 9 billion yuan in revenue. Not only did mobile telecommunications get a lot of service provision fees from it, but other industries also flocked to it. PDAs, landline phones, and the Internet have all become platforms for providing text messaging applications and services. The MMS service that can send multimedia information such as photos and sounds has also emerged. It’s true that everyone wants to share in the big pie of the “SMS economy” and is planning to make the pie bigger. ?SMS certainly brings us a lot of convenience, but the various miscellaneous text messages we often receive are also quite annoying. Some lie that you have won a big prize and want to defraud you of money, some claim that the company supplies parallel imports ranging from mobile phones to cars, and so on. Therefore, spam text message filtering has become a focus of people's attention. 2. Internet: “Netizens” like me. The number of Internet users worldwide has exceeded 600 million, and the number of Chinese netizens will also reach 60 million. With such a huge user group, the Internet is no longer just a marginalized technology, but has become an indispensable part of life.

3. Digital camera: Let film "go away". The idea of ??digital camera is not mysterious. I guess many people have considered it. There were no digital cameras in the world at that time, and they didn’t even have a name. The main reason is that components such as photoelectric sensors, recording chips, and image processing have not been developed, or their prices have not been reduced to a low enough level. A digital camera can be regarded as a high-tech product. It must be a comprehensive innovation, and it cannot be achieved by just a concept or only a certain part of the technology. ? The advantages of a digital camera are: 1) Save money, just charge it enough, and delete it if you don’t take good pictures. 2) Environmental protection and resource saving. 3) Fast and can adapt to urgent needs. 4) The color performance is better than that of ordinary film cameras, but certainly not as good as professional cameras. 5) Suitable for mass shooting 6) Pictures can be easily stored for a long time without distortion. ?The current problems are: 1) It is difficult to repair if it is broken, 2) The shutter speed is not enough, so you often encounter problems when taking pictures. 3) It also consumes a lot of power. 4) Many features are flashy. 5) Developing and printing photos is more expensive

4 DV: Even if you can’t become Zhang Yimou 5. Credit card: Use one card to travel all over the world. Use a transportation card when going out to take a bus, a credit card when shopping, a social security card when seeing a doctor, and a family card Utility, electricity, gas and telephone bills were also debited directly from the bank. ?Nowadays, there are so many types of electronic cards that it is difficult to list them all. Carrying a lot of cards in your pocket is naturally more convenient and safer than carrying a lot of money, especially when you are on a business trip or traveling. However, it is not easy to remember so many passwords. ?The government has launched “all-in-one card” projects such as social security “all-in-one card”, transportation “all-in-one card” and bank card “all-in-one card”, so that various cards with various names can be concentrated into a few cards, which is naturally much more convenient to use.