书言20世纪还有3年就要过去了。人类在这个世纪里创造了大量的发明。电子计算机是其中最伟大的技术发明之一。在人类历史上过去所创造的一切工具或机器都是人类四肢或五官的延伸，而计算机则是大脑的延伸，大大提高了人类脑力劳动的效gg。自从1946年计算机诞生以来，在这50多年 The book is about three years into the 20th century. Humans have created a great deal of inventions in this century. One of the greatest technological inventions is the electronic computer. In the history of mankind, all the tools or machines created in the past are extensions of the human limbs or facial features. The computer is an extension of the brain and greatly enhances the effectiveness of human mental work. Since 1946 the birth of the computer, in these 50 years