differentiated paper manufactured for folding whose surfaces have been differentiated. Duo paper may be either plain or patterned. The surfaces of plain duo are each printed a different plain colour. One surface of patterned duo is printed with a pattern and the other with a plain colour.
DUO (Chinese: 双景坊) is a contemporary twin-tower integrated mixed-use development (comprising residential accommodation, offices, a hotel and a retail gallery) located on a site bordered by Ophir Road, Rochor Road and Beach Road in Singapore. Designed by architect Ole Scheeren and scheduled for completion in 2017. DUO will be directly connect... Found on http://en.wikipedia.org/wiki/DUO
(from the article `chamber music`) ...strings and the lute or harpsichord) were usually involved in the performance. Later in the 17th century works for one instrument and continuo ... Found on http://www.britannica.com/eb/a-z/d/83