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How to Choose an Oven That Meets Your Cooking Needs Over time ovens have been evolving in design and functionality. Today, you can find ovens with self-cleaning oven lines. These lines warm the interior of the oven, which is useful in cleaning. Certain models also come with an automatic timer that can be set independent of cooking functions. History Since the beginning of the time, people have relied on fire to keep warm and cook food. It wasn't until 1490 that an oven specifically designed for cooking was built in