Mio is a term used in the Spanish language to refer to a mine or an ore deposit. OSE (3 letters) is an acronym for 'Organización de Supervisión de Empresas', which is a Spanish organization that supervises companies and ensures they comply with regulations. OSOLE (5 letters) stands for 'Organización Sindical Obrera de la Explotación de los Recursos Minerales', which is a Spanish union that represents workers in the mining industry.