title: Clarity on teamcity parameters and its types
body: <p>I'm trying to understand about variables in teamcity. My understanding is there are 3 kinds of variables(<em>System,Env,Config</em>)</p>
  <p>But in jetbrains documentation I saw more variables. Looks like agent variables and server side variables are separate.</p>
  <p>But in TeamCity, parameters section when I select &quot;kind&quot; config or system or env, all kinds of values are populated (I Expected only relevant values should come)</p>
  <p>Not really clear about when we have to use which variable. Is TeamCity having 6 variables for parameters(<em>Serverside:env,sys,config and Agent:env,sys,config</em>).</p>