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.
Specific Symptoms of Social Anxiety. Social anxiety disorder is characterized by the presence of all of the following symptoms: A significant and persistent fear of one or more social or performance situations in which the person is exposed to unfamiliar people or to possible scrutiny by others.