| OP290A | 
                                        TT Electronics | 
                                        31,820 | 
                                        EMITTER IR 890NM 150MA T 1 3/4 | 
                                    
                                                                    
                                        | OP290ARC/883C | 
                                        Rochester Electronics | 
                                        50,000 | 
                                        IC OPAMP GP 2 CIRCUIT 20CLCC | 
                                    
                                                                    
                                        | OP290B | 
                                        WEC | 
                                        50,000 | 
                                        EMITTER IR 890NM 150MA T 1 3/4 | 
                                    
                                                                    
                                        | OP290C | 
                                        TT Electronics | 
                                        50,000 | 
                                        EMITTER IR 890NM 150MA T 1 3/4 | 
                                    
                                                                    
                                        | OP290FZ | 
                                        Rochester Electronics | 
                                        73,520 | 
                                        IC OPAMP GP 2 CIRCUIT 8CERDIP | 
                                    
                                                                    
                                        | OP290GPZ | 
                                        Analog Devices, Inc. | 
                                        50,000 | 
                                        IC OPAMP GP 2 CIRCUIT 8DIP | 
                                    
                                                                    
                                        | OP291A | 
                                        TT Electronics | 
                                        50,000 | 
                                        EMITTER IR 890NM 150MA T 1 3/4 | 
                                    
                                                                    
                                        | OP291B | 
                                        TT Electronics | 
                                        50,000 | 
                                        EMITTER IR 890NM 150MA T 1 3/4 | 
                                    
                                                                    
                                        | OP291C | 
                                        WEC | 
                                        50,000 | 
                                        EMITTER IR 890NM 150MA T 1 3/4 | 
                                    
                                                                    
                                        | OP291GS | 
                                        Rochester Electronics | 
                                        65,740 | 
                                        IC OPAMP GP 2 CIRCUIT 8SOIC | 
                                    
                                                                    
                                        | OP291GS-REEL | 
                                        Analog Devices, Inc. | 
                                        5,884,460 | 
                                        IC OPAMP GP 2 CIRCUIT 8SOIC | 
                                    
                                                                    
                                        | OP291GS-REEL7 | 
                                        Analog Devices, Inc. | 
                                        96,000 | 
                                        IC OPAMP GP 2 CIRCUIT 8SOIC | 
                                    
                                                                    
                                        | OP291GSZ | 
                                        Analog Devices, Inc. | 
                                        50,000 | 
                                        IC OPAMP GP 2 CIRCUIT 8SOIC | 
                                    
                                                                    
                                        | OP291GSZ-REEL | 
                                        Analog Devices, Inc. | 
                                        49,000 | 
                                        IC OPAMP GP 2 CIRCUIT 8SOIC | 
                                    
                                                                    
                                        | OP291GSZ-REEL7 | 
                                        Analog Devices, Inc. | 
                                        130,600 | 
                                        IC OPAMP GP 2 CIRCUIT 8SOIC |