The Congressional Research Service recently updated a report on Small Business Contracting that provides a nice overview of how small businesses work and do business with the federal government. They also recently updated a primer on SBA programs and funding. Both reports provide excellent information that may be helpful to small businesses seeking to do business with the federal government or businesses that wish to take advantage of the programs provided by the SBA.
You can review the reports here:
An Overview of Small Business Contracting
Small Business Administration: A Primer on Programs and Funding