FrontMatter -- Preface -- Acknowledgment of Reviewers -- Contents -- Tables, Figures, and Boxes -- Acronyms and Abbreviations -- Summary -- 1 Overview -- 2 Fundamentals of Lightweight Armor Systems -- 3 Mechanisms of Penetration in Protective Materials -- 4 Integrated Computational and Experimental Methods for the Design of Protection Materials and Protection Systems: Current Status and Future Opportunities -- 5 Lightweight Protective Materials: Ceramics, Polymers, and Metals -- 6 The Path Forward -- Appendixes -- Appendix A: Background and Statement of Task -- Appendix B: Biographical Sketches of Committee Members -- Appendix C: Committee Meetings -- Appendix D: Improving Powder Production -- Appendix E: Processing Techniques and Available Classes of Armor Ceramics -- Appendix F: High-Performance Fibers -- Appendix G: Failure Mechanisms of Ballistic Fabrics and Concepts for Improvement -- Appendix H: Metals as Lightweight Protection Materials -- Appendix I: Nondestructive Evaluation for Armor -- Appendix J: Fiber-Reinforced Polymer Matrix Composites.