Contract: Mutually binding legal relationship obligating the seller to furnish the supplies or services and the buyer (the Government) to pay for them.
Solicitation: Any request to submit offers or quotations to the Goverment
Invitations for Bid (IFB): Solicitation under sealed bid procedures
Request for Proposal (RFP): Solicitation under negotiated procedures
Request for Quotation (RFQ): Solicitation under Simplified Acquisition Procedures
