No particular commodity dominates the traffic carried by airfreight operations. Perhaps the best distinction is that most freight has high value and priority. Businesses tend to utilize scheduled or nonscheduled air cargo movements when the service proposition justifies high cost. Products with the greatest potential for regular air movement are those having high value or extreme perishability. When the marketing period for a product is extremely limited, such as Christmas gifts, high-fashion clothing, fresh fish, or cut flowers, air may be the only practical transportation method to support global operations. Routine logistics of products such as computers, repair parts, and medical supplies also utilize airfreight.