It uses the 3270 terminal (xterm has a 3270 mode I&#x27;ve used), interface is predominantly &#x27;ispf&#x27;, it&#x27;s essentially menu driven; you can browse&#x2F;search the filesystem, edit files, submit jobs (everything is a job ie jcl ie job control language; compile, run programs etc) browse job spools (stdout from a job).<p>Google will show you images of ispf, browsing the jcl manuals will give you nightmares.