Chapter Eleven · Part 3: The Bigger World
How Software Gets Built and Shipped
The apps you use weren't written once and left alone. They're built by teams, changed constantly, and delivered to you over and over. This chapter follows a change from a developer's keyboard all the way to your screen — and explains why software never stops updating.
So far this course has shown you what a computer is and what happens when you open a website — the machine running the code, and the network carrying it to you. But where does the code itself come from? Real software is made by people, and that turns out to be a whole story of its own.
This chapter zooms out to the work behind the apps. Four topics trace the path a change takes: teams writing code together, keeping track of every version, testing and delivering it to users, and then fixing and improving it forever after. By the end, the update notification you usually dismiss will make a lot more sense — and so will the names of half the courses in this catalog.