Book excerpt: There has been very rapid development in computing in recent years and this is now a general trend in the field of orthopedics. In orthopedic trauma, there is much enthusiasm surrounding the use of surgical navigation in musculoskeletal trauma. In light of these developments, the successful first edition of this book has been revised and updated including new information to the original chapter on CAOS (computer-aided orthopedic surgery) and an additional chapter on osteoporosis. A chapter on hip fracture rehabilitation has also become necessary. This updated book provides an excellent resource in trauma for orthopedic residents around the world.