Concerning an interesting subject. Click on the below link to learn more. http://www.gothamnetworking.com/blogs/entry/Should-we-be-using-them Sent from my iPhone Fred C. Klein, Managing Partner Klein Zelman Rothermel Jacobs & Schess, LLP and Co-Founder www.gothamnetworking.com. 485 Madison Ave., Room 1301, NYC, 10022, 212 935 6020