Title: The computation of the cohomology rings of all groups of order 128 Authors: David J. Green Simon A. King Abstract: We describe the computation of the mod-2 cohomology rings of all 2328 groups of order 128. One consequence is that all groups of order less than 256 satisfy the strong form of Benson's Regularity Conjecture. Status: Submitted, January 2010 Note: Supersedes Green's preprint (2008) on the regularity conjecture.