Here you can see details of a specific vendor, the products they sell and their policy on support if published.
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Suse run either a 10 or 13 year life cycle for their products. They have a general support period of 7 or 10 years which is split into 3 distinct periods where enhancements and service packs are removed. They also have an extended support period where fixes and updates are issued for 2 or 3 years.