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.
Snagit is a screenshot program that captures video display and audio output. Originally for the Microsoft Windows operating systems, recent versions have also been available for Mac OS, but with fewer features. It is created and distributed by TechSmith, and was first launched in 1990.