Power Sources & Supplies 692 Tools - Manufacturing Aids 155 Rubber - Plastic Parts 289 Semiconductors & Integrated Circuits 95 Fiber Optics 46 Sensors, Transducers, & Detectors 115 Automotive - Vehicular 137 Shaft Hardware 154 Fans and Blowers 254 Electrical 312 Hardware, Tools, Prototype & Construction Aids 370 Tape - Adhesive 31 Audio Equipment - Parts 578 Aircraft & Government Surplus 88 Bells - Horns - Buzzers 31 TV- Telephone - CCTV - CATV 239 Lamps, Bulbs, & Displays 925 LASER - Optics 81