Amazon Business, Fisher Scientific and Overstock.com received contracts, and will begin work in about 30 days.

The agency was allowed to continue evaluating proposals but couldn't issue pilot awards while the protest was in effect.

The internet retailer has taken issue with ambiguous terms that restrict competition, since the agency revised its solicitation in January.

Op-Ed: Former U.S. Chief Acquisition Officer Anne Rung believes that bringing the simplicity of the consumer online buying experience to government customers will improve transparency and compliance.