Xerographic office photocopying was introduced by Xerox in 1949, and it gradually replaced copies made by Verifax, Photostat, carbon paper, mimeograph machines, and other duplicating machines.
There have been many standard sizes of paper at different times and in different countries, but today there are two widespread systems in use: the international standard (A4 and its siblings) and the North American sizes.
The buttocks (singular: buttock) are rounded portions of the anatomy located on the posterior of the pelvic region of apes and humans, including many other bipeds or quadrupeds.
Obesity is a medical condition in which excess body fat has accumulated to the extent that it may have an adverse effect on health, leading to reduced life expectancy and/or increased health problems.