Hippocampal inputs. Grid cells and boundary cells .- LEC and objects / external-information.- Peri/postrhinal vs. subicular complex, Retrosplenial cortex.- HD cells.- Modulatory inputs. Hippocampal processing. Remapping and context encoding.- Hippocampal subregions (transverse, longitudinal axes).- Look-ahead (VTE, replay, preplay, nonlocal representation).- Theta and oscillations (oscillatory interference, phase coding, phase precession).- Splitters, cells that remap to reflect the structure of the task at hand.- Time cells.- Neuroethological aspects (Humans, Primates, Bats). Hippocampal readout. Prefrontal interactions.- Striatal interactions.- Amygdala interactions.- Cerebellar interactions.- Parietal interactions.