The document presents a taxonomy of nine common web site user interface designs: Newspaper-type (NPT-I), Central grid-based (CGB-I), Central item + comment list (CICL-I), Upper menu + sections (UMS-I), Bank-type (BKT-I), Wiki-type (WKT-I), Mail-type (MLT-I), Standard (STD-I), and Mobile-friendly (MBL-I). Each interface type is defined by its characteristic design layout and navigation structure. Examples of popular websites that employ each interface type are provided.