https://en.wikipedia.org/wiki/Imperial_and_Royal
WebThe phrase Imperial and Royal (German: kaiserlich und königlich, pronounced [ˈkaɪzɐlɪç ʔʊnt ˈkøːnɪklɪç]), typically abbreviated as k. u. k., k. und k., k. & k. in German (in all cases the "und" is always spoken unabbreviated), cs. és k. (császári és királyi) in Hungarian, c. a k. (císařský a královský) in Czech, C. i K. (Cesarski i Królewski) in Polish, c. in k.