I have about 50 people in my Contacts on my iPhone (which is linked to my MAC and iPad as well). These are friends, family, and personal contacts, I like being able to scroll thru the relatively small list. I would like to be able to save my customers to my contact list as well, but I would like them to be part of a separate list. I currently have about 200 customers and more get added every day. How can I make 2 separate contact lists, personal and work, so that they don't co-mingle and I can scroll thru them individually?