Classify each of the following items into at least three categor

Classify each of the following items into at least three categories and state your principle of classification.
a. Restaurants
b. Pets
c. Computer software
【正确答案】：a. Restaurants can be classified according to cuisine (Italian, Chinese, Mexican), ambiance (casual or fine dining), and price range (budget-friendly or upscale).
b. Pets can be classified based on species (dog, cat, bird), size (small, medium, large), and temperament (friendly, independent, active).
c. Computer software can be classified according to purpose (productivity, entertainment, security), compatibility (Windows, Mac, Linux), and cost (free or paid).