There was nothing 20 years ago, but now there is.

Many things and technologies that were not available 20 years ago can be included in the following scope:

1. Mobile communication and smart phones: Twenty years ago, mobile phones and smart phones were not popular, and people usually used traditional analog phones. But now, smart phones have become an indispensable part of people's daily life, which can be used in communication, social interaction, entertainment, payment and many other aspects.

2. Internet and social media: Twenty years ago, the Internet was not as popular as it is now, and many online services that we now take for granted did not exist at that time. Social media, online shopping, online video, sharing economy, etc. They are all things that have only risen in the past ten years.

3. Digital cameras and drones: Twenty years ago, digital cameras just emerged, and many people still use film cameras. Now, digital cameras have become one of the necessary tools for photographers. Drones have only gradually become popular in the past decade.

4. Electric vehicles and autonomous driving technology: Twenty years ago, electric vehicles had not become the mainstream means of transportation. Nowadays, with the improvement of environmental awareness and technological progress, electric vehicles are becoming more and more popular. Automatic driving technology is also a hot spot in recent years, which may have a significant impact on traffic in the future.

5. Health technology and gene editing: Twenty years ago, people paid less attention to health technology and gene editing. With the increasing pursuit of health and longevity, technologies in these fields have also been rapidly developed and applied.

In short, many things and technologies that did not exist 20 years ago have developed rapidly in the past few years. The emergence and development of these technologies have brought a lot of convenience and changes to our lives.