The Albert system refers to a system of clarinet keywork and fingering developed by Eugène Albert. In the United Kingdom it is known as the simple system. It has been largely replaced by the Boehm system and Oehler system.
The Albert system is still used, mainly by clarinetists who perform Belarussian, Russian, Ukrainian and Turkish folk music, Klezmer, and Dixieland styles. Often these musicians prefer the Albert system due to the ease of slurring notes provided by unkeyed tone holes.