title: What are the full form of SAPI, PAPI and EAPI? What are the difference and when to use what?
body: <p>I am front end developer and recently hearing these new terms (new to me). I searched Google for explanation but got more confused with multiple full forms.</p>
  <ul>
  <li>SAPI: System API/ Server API</li>
  <li>PAPI: Process API/ Performance API</li>
  <li>EAPI: Enterprise API/ Experience API</li>
  </ul>
  <p>Until now, I was creating REST API end points with Node JS and Express/ Mongoose, but never felt the need to divide my API in above categories. Please guide me on when to use what and how to implement the same. TIA.</p>