PSPIKE: A parallel hybrid sparse linear system solver. The package PSPIKE is a high-performance, robust, memory efficient, and scalable software for solving large sparse symmetric and unsymmetric linear systems of equations on shared-memory and distributed-memory architectures using thousands of compute cores. PSPIKE combines the robustness of a direct linear solver and the performance scalability of an iterative linear solver. Features of the library version: Unsymmetric, or symmetric systems, real, parallel on distributed-memory clusters, combinatorial graph algorithms