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                  Laser Crystal Ltd.
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                  Distributor of nonlinear laser crystals and other laser optical components.
                   
                  
                  
                   
                  
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                  AFG Industries, Inc.
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                  Manufacturer of glass for residential, commercial, and industrial uses.  Located in Kingsport, Tennessee.
                   
                  
                  
                   
                  
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                  Pilkington
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                  Pilkington has three main areas of activity - building, automotive and    technical products glass.
                   
                  
                  
                   
                  
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                | 5.  | 
                
                  
                  Oldcastle Glass
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                  Produces heat-treated glass, including tempered safety, heat-strengthened, and insulating units for commercial and industrial applications.
                   
                  
                  
                   
                  
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