| H21A1 | 
                                        Isocom Components | 
                                        2,170 | 
                                        SENSOR OPT SLOT PHOTOTRAN PC PIN | 
                                    
                                                                    
                                        | H21A1 | 
                                        onsemi | 
                                        35,000 | 
                                        SENSOR OPT SLOT PHOTOTRAN PC PIN | 
                                    
                                                                    
                                        | H21A2 | 
                                        Isocom Components | 
                                        893 | 
                                        SENSOR OPT SLOT NPN PC PINS | 
                                    
                                                                    
                                        | H21A2 | 
                                        Fairchild Semiconductor | 
                                        35,000 | 
                                        TRANSISTOR OUTPUT SLOTTED SWITCH | 
                                    
                                                                    
                                        | H21A2 | 
                                        onsemi | 
                                        35,000 | 
                                        SENSOR OPT SLOT PHOTOTRAN PC PIN | 
                                    
                                                                    
                                        | H21A3 | 
                                        Isocom Components | 
                                        4,026 | 
                                        SENSOR OPT SLOT PHOTOTRAN PC PIN | 
                                    
                                                                    
                                        | H21A3 | 
                                        onsemi | 
                                        35,000 | 
                                        SENSOR OPT SLOT PHOTOTRAN PC PIN | 
                                    
                                                                    
                                        | H21A4 | 
                                        Fairchild Semiconductor | 
                                        35,000 | 
                                        TRANSISTOR OUTPUT SLOTTED SWITCH | 
                                    
                                                                    
                                        | H21A4 | 
                                        onsemi | 
                                        35,000 | 
                                        SENSOR OPT SLOT PHOTOTRAN PC PIN | 
                                    
                                                                    
                                        | H21A5 | 
                                        Fairchild Semiconductor | 
                                        741 | 
                                        TRANSISTOR OUTPUT SLOTTED SWITCH | 
                                    
                                                                    
                                        | H21A5 | 
                                        onsemi | 
                                        35,000 | 
                                        SENSOR OPT SLOT PHOTOTRAN PC PIN | 
                                    
                                                                    
                                        | H21A6 | 
                                        Fairchild Semiconductor | 
                                        35,000 | 
                                        TRANSISTOR OUTPUT SLOTTED SWITCH |