Dovetail joint type of joint is used in box constructions such as drawers, jewellery boxes, cabinets and other pieces of furniture where strength is required. It is a difficult joint to make manually, requiring skilled workmanship. There are different types of dovetail joints. The joint is strong especially when used with glue. The angle of slope varies according to the wood used, purpose of joint and type of work. Typically the slope is 1:6 for softwoods and a shallower 1:8 slope for hardwoods. Often a slope of 1:7 is used as a compromise. However, a different slope does not affect the strength
Mitre Corporation Mitre occupied in September 1959. After the SAGE project ended in the early 1960s, the FAA selected Mitre to develop a similar system to provide automated air traffic control. The result of the project formed the National Airspace System (NAS), that is still in use today. To support the NAS project and continual operations with the U.S. Department of Defense at the Pentagon, Mitre opened a second "main office" in McLean, Virginia. Through the 1960s, Mitre developed and supported military Command, Control, Communications and Intelligence (CI) projects, including the Airborne Warning and Control System (AWACS). Mitre also worked on a