# Vector Operations (Vec)
PETSc vectors (`Vec`) are used to store the field variables
in PDE-based (or other) simulations. Users guide chapter: [](ch_vectors)
Examples
mpiviennacl/
mpiviennaclcuda/
kokkos/
cupm/
commonmpvec.c
pbvec.c
pdvec.c
pvec2.c
pvecimpl.h
vmpicr.c