A look at the 2009 Top 100 list reveals a lot of familiar names. In fact, the top 20 companies are the same group as last year, with just a few adjustments.

Lockheed Martin Corp. is No. 1 for the 15th straight year, with nearly $15 billion in prime contracts for government technology services.

And once again, Boeing Co. and Northrop Grumman Corp. round out the No. 2 and No. 3 spots, respectively.

The 16th annual Washington Technology Top 100 was compiled with the help of market research firm Eagle Eye Publishers, which analyzed reports in the Federal Procurement Data System to create the rankings.