Pressurization becomes increasingly necessary at altitudes above 12,500 to 14,000 feet (3,800 to 4,300 m) above sea level to protect crew and passengers from the risk of a number of physiological problems caused by the low outside air pressure above that altitude.
1. (Architecture) the art and science of designing and superintending the erection of buildings and similar structures. 2. (Architecture) a style of building or structure: Gothic architecture. 3. (Architecture) buildings or structures collectively. 4. the structure or design of anything: the architecture of the universe.
Open architecture. Not to be confused with Open-source architecture. Open architecture is a type of computer architecture or software architecture that is designed to make adding, upgrading and swapping components easy. For example, the IBM PC and Apple IIe have an open architecture supporting plug-in cards, whereas the Apple IIc and Amiga 500 computers have a closed architecture.