Uniquely Mapped Reads : reads that mapped uniquely to the genome.
Multi-Mapped Reads : reads that mapped to multiple locations in the genome.
Base Pairs Mapped to Exonic Regions : bases in primary alignments that align to a coding base or a UTR base for some gene.
Base Pairs Mapped to Intronic Regions : bases in primary alignments that align to an intronic base for some gene, and not a coding or UTR base.
Base Pairs Mapped to Intergenic Regions : bases in primary alignments that do not align to any gene.