The Online Mendelian Inheritance in Man (OMIM) database is a comprehensive knowledgebase of human genes and genetic disorders compiled to support genetics research and clinical practice. It contains information on disorders that are inherited in a Mendelian fashion and follow patterns of autosomal dominant, autosomal recessive, X-linked, Y-linked, or mitochondrial inheritance. Each genetic disorder in OMIM is assigned a unique six-digit number indicating its inheritance pattern. Users can search OMIM by disease name, gene, or chromosome to access detailed information on genetic disorders.