Prisoner Visitation and Support (PVS) is a non-profit organization based in Philadelphia.
Their particular focus is prisoners who don't receive regular visits, are facing long sentences, and/or are in solitary confinement.
In 1975, the Department of Defense granted PVS similar access to all military prisons.
[3] Prisoner Visitation and Support was founded in 1968 by long-time prison visitors and activists Fay Honey Knopp and Bob Horton, in part as a support to conscientious objectors and other draft resisters in the Federal system.
As the Vietnam era ended and conscientious objectors were released, the group's mission expanded to embrace all federal and military prisoners in need of support and visitation.