Although the disc media and the drives of the CD and CD-ROM are, in principle, the same, there is a difference in the way data storage is organized. Two new sectors were defined, Mode 1 for storing computer data and Mode 2 for compressed audio or video/graphic data.
Most emphysema causes involve repeated breathing in of fumes and other things that irritate and damage the lungs and airways. Specific causes of emphysema can include: 1  Cigarette smoking. 2  Pipe, cigar, and other types of tobacco.3  Certain fumes or dust. 4  Genetic factors.ost emphysema causes involve repeated breathing in of fumes and other things that irritate and damage the lungs and airways. Specific causes of emphysema can include: 1  Cigarette smoking. 2  Pipe, cigar, and other types of tobacco.
Emphysema caused by smoking most often occurs in the upper lobes of the lungs. In chronic bronchitis, smoking triggers inflammation that causes damage in the airways. The processes involved include: 1  Damage to the cilia, the hair-like waving projections that move mucus, bacteria, and foreign particles out of the lungs. 2  Enlargement of the mucus glands in the large airways of the lungs. 3  Overgrowth of smooth muscle cells in the airway.