Utex Scientific Instruments Inc.
Develops hardware and software for the nondestructive testing industry. Ultrasonic pulser receivers, variable high-pass low-pass filters, and Windows-based data acquisition and ultrasonic simulation software.
http://www.utex.com/

TTE
Rf Filters: Specializing in radar application, analog filters, passive filters, uhf filters, vhf filters, antenna filters, differential filters, d/a filters, dac application filters, and adc filters
http://www.tte.com

Filtronetics Inc.
Filtronetics has Bandpass Filters, Clock Oscillators, Quartz Crystals and RF SAW Filters. Highest quality Custom LC Filters|Microwave Filters|Ceramic Filters|RF SAW Filters|Crystal Filters|Bandpass Filters|Low Pass Filters|High Pass Filters|Clock Oscillators|Quartz Crystals. A valued supplier, designer and manufacturer of electronic frequency products Filtronetics based in Kansas City Missouri.
http://www.filtro.net

Filtration Solutions Worldwide
By-pass filters for diesel engines.
http://fs2500.com

Lee Filters
High quality camera filters, lighting filters, gobos, and other studio-related products. Camera Bellows.
http://www.leefilters.com/

Microlab/FXR
At Microlab/FXR we offer low pass filter, dummy load and microwave component for wireless LAN, laboratory, and high power systems. View our website for product specifications.
http://www.fxr.com

Lee Filters Home Page
Supplier of high quality camera and lighting filters, gobos, and other studio-related products.
http://www.leefilters.com/

Superior Boiler Works
Waste heat boilers, Deaerators, Economizers, Feedwater tanks, Boiler Room Equipment, Custom Steel Fabrication
http://www.superiorboiler.com/

TV 'helps pupils pass exams'
Watching television could help you pass your exams, say researchers at Reading University.
http://news.bbc.co.uk/1/hi/education/878512.stm

Pass Labs
High-end solid state amplification, pre-amplifiers, loudspeakers featuring minimalist philosophy.
http://www.passlabs.com