ABACUS, a German-English Progressive rock music playing band was founded in 1971, publishing four albums on the Polydor Record label, produced in Giorgio MORODERs Musicland in Munich. They were celebrated on numerous rock festivals being a steady institution next to EMERSON, LAKE & PALMER, SANTANA et PINK FLOYD. Musical differences for forthcoming productions were decisive for the bands break in 1976. They reported back in 1980 with an EMI deal, but were forced by their publishing house to write German words for their next production. So they split again in 1983 after having done just one single in English. In 1997 at last ABACUS met again to do some unpublished songs for their fifth long waited album Fire Behind Bars. This is a special project led by the multi-instrumentist Jrgen WIMPELBERG (Vocals, keyboards, guitars & programming), helped by numerous guests, lets mention Robert VALET and Peter TERHOEVEN from SOLAR PROJECT. This seven songs, plus one instrumental piece, are a kind of pop-rock Progressive music, carefully worked-out and produced, due to the long past career of the band. ABACUS develops Pop melodies into a wide instrumental manner, with gorgeous neo-classical and symphonic sequences. In a vein near GENESIS, GREENSLADE or PINK FLOYD, ABACUS offers a modern and attractive Progressive rock.