Burn In Systems is a type of testing used to identify and eliminate any potential defects in a product before it is released to the public. This type of testing is typically used for electronic components, such as integrated circuits, and involves running the product through a series of tests to identify any potential problems. The tests are designed to simulate the conditions the product will be exposed to during its lifetime, such as temperature, humidity, and voltage. This type of testing is important to ensure the product is reliable and will perform as expected.