Additional emphasis was given to ergonomics, aerodynamics, and safety. Some think of usability as the software specialization of the larger topic of ergonomics. Biological improvements focus on improvements to ergonomics, health conditions, and employee comfort. The revisions centered on ergonomics and improving reliability. The rifle had to have a Rail Integration System, better ergonomics and improved reliability. Yet K-3 supersedes AK-74 in terms of minimisation of recoil, accuracy, ergonomics, balancing and mobility. Ergonomics and Human Factors concerns are important in the design of modern cockpits. The book spans several disciplines including behavioral psychology, ergonomics, and design practice. They differed in weight, introduced a new recoil compensation technology and improved ergonomics. Arrangements involves concept design, layout and access, fire protection, allocation of spaces, ergonomics and capacity. The rifle stock design is designed for good ergonomics. DHMs are recognized as evolving and valuable tool for performing proactive ergonomics analysis and design. Using engineering data, the simulations assist evaluation of assembly ergonomics. New radios offered Radio Data System compatibility, XM satellite radio, Bose sound and improved ergonomics. Here the emphasis is on ergonomics and the comfort of the passengers.