TULSA, Okla.(AP) _ Aaon Inc. of Tulsa and Sonic Corp. of Oklahoma City are included on the Forbes 200 Best Small Companies list.
Aaon was ranked 36th and Sonic was ranked 122nd.
Aaon makes air-conditioning and heat-recovery equipment for companies such as Wal-Mart and Home Depot. Aaon was ranked 16th among the Forbes top 200 in five-year return on equity.
Sonic, the nation's largest chain of drive-in restaurants, made the list for the eighth consecutive year. It was the only quick-service restaurant on the 2001 ranking.
Sonic started as a hamburger and root beer stand in Shawnee in 1953.