This document discusses Function as a Service (FaaS) platforms and frameworks. It provides a list of various commercial and open-source FaaS offerings like AWS Lambda, Google Cloud Functions, Azure Functions, and OpenWhisk. It also lists related tools for monitoring, debugging and developing FaaS functions. The document then discusses using API Gateways to manage traffic to functions and integrating Prometheus for monitoring. It provides a simple example of using OpenFaaS and faas-cli to build and deploy a sample "Cowsay" greeting function to demonstrate FaaS.