Want to use the OASIS contract family this buying season? Sign up for the next OASIS training. OASIS, OASIS Small Business (SB), and OASIS 8(a) are family of governmentwide multiple award, IDIQ contracts that provide flexible and innovative solutions for complex professional services. The DPA gives contracting officers access to the OASIS Unrestricted and OASIS Small Business contract vehicles and teaches best practices for task order issuance.