title: Online C reference manuals
body: <p>I've studied C programming in college some years ago and have developed some medium applications back then (nothing serious). Now I have to develop some more 'advanced' C applications (involving POSIX threads and RPC), but right now I'm a little rusty even with the basics.</p>
  
  <p>Can anyone recommend me good online C reference manuals? This may help me get in tune faster.</p>