title: What is high level modules and low level modules.?
body: <p>I know this is the exact duplicate of below link. </p>
  
  <p><a href="https://stackoverflow.com/questions/3780388/what-are-high-level-modules-and-low-level-modules-in-the-context-of-depende">What are &quot;High-level modules&quot; and &quot;low-level modules&quot; (in the context of Dependency inversion principle)?</a></p>
  
  <p>But after reading that I do not understand what exactly it is. </p>
  
  <pre><code>High level modules are abstract classes and Interfaces ?
  </code></pre>