piral track or groove that is cut and read by a laser beam. Its logical format specifications are governed by the ISO 9660 and 13490 standards. [Computer and Information Sciences]  A sphere of functional responsibility entrusted to a physical or juridical person. [General Dictionaries] 
n., The ability of different devices or systems (e.g., programs, file formats, protocols, even programming languages
) to work together or exchange data without modification. 
a., Different systems (e.g., programs, file form