This document discusses strategies for protecting technological innovation. It notes that while traditionally firms have emphasized vigorously protecting innovations, the decision is complex. Firms must consider factors like whether knowledge can be easily duplicated by competitors or if it arises from complex social interactions. The document also distinguishes between patents, trademarks, and copyrights as different intellectual property protection mechanisms. Finally, it discusses the effectiveness of protection strategies on a continuum from wholly proprietary to wholly open approaches and provides examples of different positions on this continuum.