As a business communications tool, email is the dominant option, and many corporations have policies that allow the use of personal email on corporate computers. In a recent Adobe Systems commissioned online survey of 400 U.S. white-collar, adult workers, more than 90 percent of them admitted checking personal emails at work. The workers questioned in the poll estimated they spend 6.3 hours a day checking emails, with 3.2 hours devoted to work emails and 3.1 hours to personal messages. Nearly half of the respondents also said that their use of emails for work will increase in coming years with 19 percent saying it will go up substantially.