This chapter demonstrates to designers and operators working in the aviation domain that there is considerable knowledge that can help them to do their respective jobs more effectively. In the aviation context, it is in locations where traffic density is highest that air traffic control (ATC) will most often have to change clearances to adjust to unexpected problems. Greater flexibility enabled by ATC automation will permit pilots to utilize a wider range of options to achieve more comfortable flight paths. Reliability has been improved; autoland-capable automation, head-up displays, and other innovations have increased the number of flights able to operate at destinations obscured by very low visibility. In the autoflight control wheel steering mode, pilots manipulate their control columns to instruct the automation what rates of change are desired for a maneuver. The 747-400 was more conservative in its automation philosophy and more evolutionary than revolutionary in its application.