The University of Michigan Spin Physics Center focuses on studies of spin effects in high polarized proton-proton elastic and inelastic scattering. These polarized scattering experiments use the world-class solid and jet polarized proton targets, which are developed, upgraded and tested at the Center. The Center obtained a record density of about 1012 spin-polarized hydrogen atoms per cm3. The Center also leads the International SPIN Collaboration and its proton polarization know-how is used in many experiments worldwide.