The HTCondor-CE software is a Compute Entrypoint (CE) based on HTCondor for sites that are part of a larger computing grid (e.g. European Grid Infrastructure, Open Science Grid). As such, HTCondor-CE serves as a "door" for incoming resource allocation requests (RARs) — it handles authorization and delegation of these requests to a grid site's local batch system. Supported batch systems include Grid Engine, HTCondor, LSF, PBS Pro/Torque, and Slurm. For an introduction to HTCondor-CE, watch our