This picture shows the information about differences of computers at different time.To begin with, the left side picture shows the computers used a long time before in black and white, while the right side picture shows the modern computer. According to this graph, the old computer was a big machine and it took lots of space. It was fixed at one spot and people had to sit in front of the desk to operate it. Last but not the least, the new computer with a screen and a keyboard is small and portable. In conclusion, technologies change dramatically in recent years, especially for the computers.