Googling Scale

I was doing maths with the help of Google in a lap top and Shanku's big Engineering mathematic text book is beside me. Then Raju annan came there and asked me about "scale". It is a text editor. I looked at the index of the big book which was there. But couldn't find it. He went out. Then i remembered i can get it in google and download it. I went near the lap top which was on the other side of the table.