Everything you needed to know about getting third-party systems to communicate with Appian can be found here. Use these topics to learn about Appian's out-of-the-box connectivity functionality.
Browsing These Topics
In this category, you will find conceptual topics about connecting Appian and other systems together. If you've never done this, start with Why Integrate.
Need a particular example or walkthrough to help you set up a particular service? This category has that. Check out the Integration Tutorial to learn how Appian calls other systems or the Web API Tutorial to learn how other systems can call Appian.