If AOL's announcement on Thursday of another 2,500 job cuts is anything to go by, the painful layoffs that have ravaged the media industry over the past year are nowhere near over.

Stocks ended slightly lower Tuesday, though the Nasdaq eked out a gain. And Citigroup shares soared.

Unemployment hit 8.9 percent in April and some predict that number could climb to over 10 percent in 2009 as major companies streamline operations to combat the recession.  But how far can this streamlining really go? For many companies, revenues hinge on worker productivity, and for most operations, per-worker profits and revenues are many multiples of average employee salaries. The measure of revenue per employee also helps shed light on a firm's money-making efficiency and likelihood it will retain jobs. The best companies require  the least number of workers to make the most money.