Special Autonomous Region. A region that is governed by laws different from those of the rest of the country. An SAR usually exhibits a high degree of self-rule. SARs exists in China (e.g., Tibet, Hong Kong, and Macao), Indonesia, Italy, and other countries.

SAR or (Specific Absorption Rate) is an unit to messure the radiation levels from radio transmitters. The FCC maximum limit on a cell phone is 1.60 in the United States, and 2.0 in Europe.