TECHNOLOGIES 41 The Technologies segment’s backlog consists of thousands of contracts and task orders across a mix of U.S. and non-U.S. government and commercial customers. These contracts can be shorter-cycle or span multiple years, but commonly include a small, initially funded order. Therefore, our estimated potential contract value of $27.7 billion is an important indicator of future orders and revenue. In 2020, approximately 60% of the segment’s orders were from additional work on IDIQ contracts or the exercise of options. Our total estimated contract value remained stable in 2020 despite the impact of reduced new business opportunities caused by COVID-19. The following represents the Combat Systems segment’s total estimated contract value by market on December 31, 2020: We received the following significant contract awards in the Combat Systems segment during 2020: • $405 from the U.S. Army to upgrade Abrams tanks to the M1A2 System Enhancement Package Version 3 (SEPv3) configuration. The contract has a maximum potential value of $4.3 billion. • $320 from the Army to upgrade Stryker vehicles to the double-V-hull A1 configuration. The contract has a maximum potential value of $2.5 billion. • $230 from the Army to produce Stryker Initial Maneuver Short-Range Air Defense (IM-SHORAD) vehicles. The contract has a maximum potential value of $1.2 billion. • $215 from the Army for the production of Hydra-70 rockets. The contract has a maximum potential value of $3.4 billion. • $870 to deliver 8x8 wheeled combat vehicles, maintenance and lifecycle support to the Spanish Ministry of Defense.