... A chair is a stable, raised surface used to sit on, commonly for use by one person.
For many centuries and indeed for thousands of years it was an article of state and dignity rather than an article of ordinary use. 
"The chair" is still extensively used as the emblem of authority in the House of Commons in the United Kingdom and Canada, 
and in many other settings. Committees, boards of directors, and academic departments all have a 'chairman'. 
Endowed professorships are referred to as chairs. It was not, in fact, until the 16th century that it became common anywhere. 
In Europe, it was owing in great measure to the Renaissance that the chair ceased to be a privilege of state, and became 
a standard item of furniture for anyone who could afford to buy it. 
Once the idea of privilege faded the chair speedily came into general use. We find almost at once that the chair began to change 
every few years to reflect the fashions of the hour. The 20th century saw an increasing use of technology in chair construction with 
such things as all-metal folding chairs, metal-legged chairs, the Slumber Chair, moulded plastic chairs and ergonomic chairs. 
The recliner became a popular form, at least in part due to radio and television, and later a two-part. 
The modern movement of the 1960s produced new forms of chairs: the butterfly chair, bean bags, and the egg-shaped pod chair. 
Technological advances led to molded plywood and wood laminate chairs, as well as chairs made of leather or polymers. 
Mechanical technology incorporated into the chair enabled adjustable chairs, especially for office use...


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