In this chapter, we outlined the means by which Julia can be used to develop and interact with networked systems.

First, we looked at services that use the UDP and TCP protocols, and then we looked at how to implement a simple echo server. Also, we investigated the emerging subject of WebSockets and continued by considering messaging systems involving e-mail, SMS, and Twitter.

Finally, we concluded with an overview of running Julia on distributed systems in the cloud and ended with an example of asynchronous execution to speed up (appropriately) the generation of a Julia set.

In the next chapter, we will be returning to explore some more advanced features of the Julia language by going under the hood, examining code generation and the low-level API, testing, and profiling. We will finish with a discussion of community groups and highlight the work of a couple of these groups that match some of my personal and professional interests.