Increasing Small Business Opportunities: GSA’s OS3 Chris Curtin 5 years ago A new GSA contract OS3 is set to save a hundred million dollars or more on office supply strategies. Small businesses need to register in System for Award Management (SAM) to be eligible to bid. Check out more about the GSA OS3 contract here Want to increase your business’ opportunities? Call 866-598-4295 or use the fast, safe & secure online funding application. Rating: 5.0/5. From 1 vote.