Computer Development: Past and Present Computer technology has developed significantly since its first appearance in the mid-20th century. Early computers were very large in size and slow in performance. They relied on vacuum tubes and consumed a huge amount of energy. The invention of transistors and integrated circuits reduced their size and improved efficiency. In the 1970s, personal computers emerged and changed daily life. Operating systems and programming languages advanced rapidly. Today, computers are faster, smaller, and more powerful. Artificial intelligence and cloud computing have become essential parts of modern computers. Computers are widely used in education, medicine, industry, and scientific research. This continuous development has greatly improved human life.