This study describes data collected regarding design decisions Web developers make in order to make their interfaces and content compatible across user environments. Qualitative data was gathered through interviews with developers across the United States. Quantitative data was collected through an examination of several Web sites' source code. Web content does not render the same in every environment. A site may have an attractive interface when viewed through one browser while being completely incomprehensible in another browser. Web developers face the complex task of deciding what types of environments to design for. This research explores the current trends and standards that developers implement to achieve compatibility.