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      What is Free Software?

      Free software is any program released with a license approved by the Free Software Foundation that allows users to view, modify, and share source code.

      Like open source, the goal of free software is to amplify developer freedom using software and to curb the spread of proprietary software licenses. Learn more about the Free Software Foundation’s philosophy.

      For an in-depth explanation of the free software movement, check out DigitalOcean’s tutorial on The Difference Between Free and Open-Source Software.

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      What is Software as a Service (SaaS)?

      Software as a Service (SaaS) is a category of cloud computing in which software is provided as a product over the internet. With SaaS, users have access to software provided by third party vendors, though they are not in charge of the production, maintenance, or modification of that software. SaaS abstracts away the software application’s underlying infrastructure so that users are only exposed to the interface they interact with.

      Examples of SaaS products include GitHub, Google Docs, Slack, and Adobe Creative Cloud. SaaS applications are popular among businesses and general users given that they’re often easy to adopt, accessible from any device, and offer free, premium, and enterprise versions of their applications.

      For more educational resources related to SaaS, please visit:

      A complete list of our educational resources on cloud computing can be found on our Cloud Computing page.

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      Infrastructure as Software


      About the Talk

      In this talk, infrastructure coder Paul Stack demonstrates why writing infrastructure in general programming languages is a better choice for infrastructure management.

      General purpose languages allow infrastructure code to have integrated testing, compile time checks, and create infrastructure APIs, and is more suited to infrastructure management than DSLs, JSON or YAML.

      Infrastructure can be built that manages Serverless, Kubernetes, PaaS and IaaS systems across multiple cloud providers.

      What You’ll Learn

      • Infrastructure code is just as important as application code
      • Infrastructure code needs the flexibility of language ecosystems
      • Different teams at different stages of cloud adoption are actually all moving in the same direction


      About the Presenter

      Paul Stack is an infrastructure coder and has spoken at various events throughout the world about his passion for continuous integration, continuous delivery, and good operational procedures, and why they should be part of what developers and system administrators do on a day to day basis. He believes that reliably delivering software is more important than its development. Paul’s passions are the DevOps and continuous delivery movements and how they help the entire business and its customers.

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