Condor is a workload management system that can manage compute-intensive jobs across clusters. It addresses managing dedicated compute nodes as well as harnessing idle desktop workstations. Condor's "flocking" technology allows multiple Condor installations to share resources. Jobs are submitted to Condor and scheduled across available machines using a scheduler, collector, and negotiator. Condor provides queueing, scheduling policies, and resource monitoring to manage jobs. The document discusses configuring a Condor central manager to enable access to a common cluster for both local and LCG/gLite grid jobs.