Sapreste dirmi a cosa server FP e FPP?

codice:
$sql = "
SELECT fp.project_id,fp.project_staff_lead,fp.project_title,fp.project_status,CONCAT(fc.client_fname,' ',fc.client_lname) AS client_name 
FROM fs_projects fp 
LEFT JOIN fs_clients fc ON fp.project_client_id=fc.user_id 
LEFT JOIN fs_project_permissions fpp ON fp.project_id=fpp.project_id" . $restriction . $orderByQuery;