Large aperture, high performance sensor windows for new tactical aerospace applications must satisfy a broad spectrum of functional performance requirements. Several design and manufacturing technologies require additional development to achieve low observability, laser hardening, abrasion resistance, environmental resistance, and shared aperture multispectral optical transmission and surface conformality at subsonic and supersonic velocities. The state of development of these technologies is discussed. Specific technology accomplishments are discussed in the areas of low observable window design implantation, diamond and hard carbon abrasion resistant coatings and bond materials, grid and electrically conductive coatings, optical substrate materials, and in-flight optical performance analytical design software. Areas requiring further technology development are also identified and discussed.