Google Hot keys

e.g.
site:nytimes.com ~college "test scores" -SATs 2009..2012

filetype:pdf air speed intitle:velocity of *swallow

author:Maxwell "gap junction"

define:bromance

(2*3)/5+44-1

54 pounds in kilograms

cmd + shift +3

cmd + shift +4

So useful!!

ref:http://www.businessweekly.com.tw/blog/article.php?id=1029&t=20120206100425