title: What do top %cpu abbreviations mean?
body: <p>Does anyone know what the 2-letter abbreviations mean in the %CPU line in the header above the top table of processes?  Here's a sample output from running top.</p>
  
  <pre><code>top - 15:10:34 up 8 days,  5:11,  1 user,  load average: 0.10, 3.80, 26.82
  Tasks:   1 total,   0 running,   1 sleeping,   0 stopped,   0 zombie
  %Cpu(s):  0.3 us,  0.7 sy,  0.0 ni, 98.0 id,  1.1 wa,  0.0 hi,  0.0 si,  0.0 st
  KiB Mem:   2051456 total,   623544 used,  1427912 free,     1292 buffers
  KiB Swap:  3203068 total,   147188 used,  3055880 free,    38352 cached
  </code></pre>
  
  <p>Here are my guesses and the ones I don't know.</p>
  
  <pre><code>us = user
  sy = system
  ni = ?
  id = idle?
  wa = ?
  hi = ?
  si = ?
  st = ?
  </code></pre>