OASIS Lists are like your email folders.  You can create as many Lists as you like, and you can put as many titles in your Lists as you like.  Currently, you cannot create sub-lists.  Your Lists are your own and no one else can access your personal Lists, however, via the "Check Status- on List" notification, your library colleagues can see if a title they're looking at is on one of your lists.  Please see the Check Status page for more information on this.  

Access your Lists from the drop-down available on most OASIS pages.

See Menu to left for further information on managing your lists.