The term 'Domingo Specialty' refers to the job of an ARIA, which is a type of vocal solo performance. An ARIA is a song-like solo piece that is usually accompanied by an orchestra or other musical ensemble. It is typically used in operas and other classical music forms. The term 'Domingo Specialty' is often used to refer to the work of the famous opera singer Plácido Domingo, who is renowned for his powerful and emotive arias.