title: Single-ownership in computer science
body: <p>I'm not sure if StackOverflow is the correct place to ask this, but hopefully it is. I am trying to find the correct word in computer science to describe that "an object is <strong>owned by a single entity</strong>, and never by two or zero." Here is an example:</p>
  
  <pre><code>product    owner       is_valid
  razor      gilette     true
  bobsled    bob, jill   false
  dirt       null        false
  </code></pre>
  
  <p>Is there a word to describe this property of single-ownership in computer science? </p>