Serverless cloud computing services started with AWS Lambda, which lets you run code without provisioning or managing servers. AWS Lambda is an example of functions as a service, or FaaS, and other FaaS implementations quickly followed at Microsoft Azure and Google Cloud. Later, cloud providers started offering other services in serverless form. Serverless was a new way of thinking about cloud services, and in practice serverless architectures often cost a fraction of provisioning permanent server instances to run the same loads.
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