A BPA is a simplified acquisition method that government agencies use to fill anticipated repetitive needs for supplies or services. Essentially, BPAs allow Buyers to make repeat purchases with a group of trusted suppliers.
An IDIQ is a U.S. federal government contracting acronym meaning indefinite delivery/indefinite quantity. This is a type of contract that provides for an indefinite quantity of supplies or services during a fixed period of time.
Both types of purchases exist on the Unison Marketplace.