In general, the µ (ALT+230) or the mu, is a unit of measurement that means one-millionth (0.000000001). So in Harsh's example, it would mean 0.000000001 x 876.88 or 0.00000087688 "somethings" which is why I was curious to the metric that was being viewed to see if it fell in that category or meant something else.
Troy