title: How can I determine the operating system and hostname using common lisp?
body: <p>To get my .sbclrc file working on the two computers I use, I'd like a way to get the hostname and/or operating system from within sbcl. I know I could set and then look for an environment variable, but is there a more direct approach?</p>
  
  <p><strong>Update</strong></p>
  
  <p>I changed the question to refer to common lisp, since the answer from Ken is not specific to sbcl.</p>