title: TypeScript - how to import 'os' module
body: <p>I'm learning Typescript. To do this, I'm building a basic utility app with Node for myself. For this app, I need to use <a href="https://nodejs.org/dist/latest-v8.x/docs/api/os.html#os_os" rel="noreferrer">Node's OS Module</a>. My question is, how do I import this module?</p>
  
  <p>In my Typescript file, I have the following:</p>
  
  <p><code>
  import { os } from 'os';
  </code></p>
  
  <p>This line generates the error: "Cannot find module 'os'". What am I missing?</p>