SDL plc is a multinational software and professional services company headquartered in Maidenhead, UK. SDL specializes in; digital marketing software and services, structured content management and language translation software and services. SDL is listed on the London Stock Exchange. SDL is an abbreviation for “Software and Documentation Localization”.

SDL has acquired numerous language technology companies including Trados, and Idiom Technologies, as well as content management system vendor Tridion, and other content and marketing technology companies including Fredhopper, Alterian, Bemoko, Calamares, and Xopus.