The key to the development of any country or nation is the use of science and technology. The words science and technology are complementary. Basically, technology is the application of the discovery of science in the realm of human welfare. The scientist is the one who explores the mysteries of nature and does research to unravel the mysteries. The technologist is the one who uses the discovery of science for human welfare. Scientists are curious and realistic about various things. Technologists use scientific discoveries with tact and patience. Example , physicist , chemist , zoologist. Examples , engineers , doctors , agriculturists. The word science means special knowledge. Science is coherent and well-balanced knowledge about the universe. And the discoveries of science through technologists are used for human welfare. They are usually used in various fields almost immediately after the discovery of science. For example, various discoveries in physics and chemistry are being widely used in medicine , engineering and even agriculture. That is, science is useless without technology. If it weren't for the discovery of science, technologists would never know about its use or benefits. In the early stages of human civilization, people ate raw meat. Later fire was discovered and people learned to cook. The use of technology began when it became possible to make sharp weapons by sharpening the bhota weapon. Therefore, technology is being associated with the discovery of science and is being used for human welfare. So it can be said that science and technology are complementary.