title: In CICS where is the data in the Linkage Section of COBOL stored?
body: <p>In CICS on z/OS I have some questions:</p>
  <ul>
  <li>What data are stored on main storage? Auxiliary storage?</li>
  <li>Where does data in DFHCOMMAREA under linkage section exists? Is it on main storage?</li>
  <li>If I pass DFHCOMMAREA from one program to another, will that create extra copies of the data?  (pass by-value or by-reference)</li>
  </ul>