Chinese Abacus. The abacus is first known in China from the Northern Song dynasty through the work of Shao Yong (1011-1077). Like many early inventions it is not clear precisely where it originally came from. Some say Central Asia; some Asia Minor and others China.
Snag(noun) a stump or base of a branch that has been lopped off; a short branch, or a sharp or rough branch; a knot; a protuberance. Snag(noun) a tooth projecting beyond the rest; contemptuously, a broken or decayed tooth.
Snagging Definition. Snagging is a slang expression used within the building industry in the UK and Ireland. It is used to describe the process of defect identification and resolution.or new build homes snagging is carried out by the homeowner or a snagging inspector when notice is served usually two weeks before completion or at any tim during the first two years of the warranty period.