What are the greatest inventions of the mankind?

There have been many important inventions throughout human history, and it can be difficult to identify the "greatest" ones.

Some inventions that have had a significant impact on human society and the way we live include:

1. The wheel: The wheel is one of the oldest and most important inventions in human history. It revolutionized transportation and made it possible to move heavy objects over long distances with ease.

2. The printing press: The printing press, invented in the 15th century, made it possible to produce books and other printed materials quickly and inexpensively. This had a profound impact on education and the spread of knowledge.

3. Electricity: The discovery and harnessing of electricity in the 19th century transformed the way we live and work. It made it possible to power a wide range of technologies, including lighting, appliances, and machinery.

4. The steam engine: The steam engine, developed in the 18th century, revolutionized transportation and played a key role in the Industrial Revolution. It made it possible to power ships and locomotives, which greatly expanded the reach of transportation networks.

5. The computer: The development of the computer in the 20th century has had a huge impact on almost every aspect of modern life. It has revolutionized communication, entertainment, business, and many other areas.

There are many other inventions that could be considered among the greatest of all time, depending on the criteria used to judge them. These are just a few examples of inventions that have had a significant impact on human society.