People long ago got used to the concept of cloud computing; they would turn over their computational needs to a service provider—an Amazon or Microsoft—and no longer have to deal with the expense of buying and maintaining their own servers. However, they still had to determine what resources they needed, such as CPU time and memory.
Now, though, there is a newer approach that puts even more conceptual distance between the software and the machine that runs it. Serverless computing is meant to let businesses and application developers focus on the program they need to run and not worry at all about the machine it is on or the resources it requires. This higher level of abstraction is designed to make life easier for developers while it makes more efficient use of the cloud providers' infrastructure.
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