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How to Choose an Oven That Meets Your Cooking Needs Over time ovens have been improved in terms of design and functionality. There are now ovens that self-clean their lines. These lines warm the interior of the oven, which is helpful to clean. Certain models also come with the ability to set a timer which can be set independent of cooking functions. History Since humans have existed, we have utilized fire to keep warm and cook food. However, it wasn't until 1490 when the first oven built specifically fo