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United States Census Bureau
The United States Census Bureau is the governmental office mandated by the United States Congress to survey and report changes in the national population. The Census Bureau's primary mission is "to be the preeminent collector and provider of timely, relevant, and quality data about the people and economy of the United States" (US Census Bureau).

Universal Design
A broad-spectrum of ideas meant to produce buildings, products and environments that are inherently accessible to both people without disabilities and people with disabilities. It emerged from slightly earlier barrier-free concepts, the broader accessibility movement and adaptive and assistive technology and also seeks to blend aesthetics into these core considerations. As life expectancy rises and modern medicine increases the survival rate of those with significant injuries, illnesses, and birth defects, there is a growing interest in universal design. There are many industries in which universal design is having strong market penetration but there are many others in which it has not yet been adopted to any great extent. Universal design is also being applied to the design of technology, instruction, services, and other products and environments. Curb cuts or sidewalk ramps, essential for people in wheelchairs but also used by all, are a common example.