Thus, the calculator-abacus was invented. In Chinese history, the origin of the abacus can be traced back to the Spring and Autumn Period, 600 B.C., and it was widely used before the invention of Arabic numerals appeared in the world. The abacus has proven to be one of ancient Chinaâs greatest inventions. Before the abacus was invented, people used small wooden sticks as calculation chips to make calculations. (Image: Derrick Coetzee via Flickr/ CC0 1.0))
Social anxiety disorder, also called social phobia, is an anxiety disorder in which a person has an excessive and unreasonable fear of social situations. Anxiety (intense nervousness) and self-consciousness arise from a fear of being closely watched, judged, and criticized by others.
â¢ Social anxiety disorder (also known as social phobia) is âa persistent and irrational fear of situations that may involve scrutiny or judgment by others, such as parties and other social events.â6. â¢ Specific phobia involves âan intense, irrational fear of something that poses little or no actual danger.