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2. Amazon compute service sla (2018). https://aws.amazon.com/compute/sla
3. Rackspace cloud sla (2018). https://www.rackspace.com/information/legal/cloud/sla
4. Microsoft azure sla (2018). https://azure.microsoft.com/en-us/support/legal/sla/?v=17.23h610
5. Google cloud sla (2018). https://cloud.google.com/compute/sla