Analytical Technologies UK
Automated electrophoresis, biochemistry analysers, bilirubinometers, ESR analysers, Osmometers and other laboratory equipment. UK only
http://www.analyticaltechnologies.co.uk/

Tutorial: Use of flue gas analysers for stack monitoring
Stack gas monitoring using a flue gas analyser for carbon monoxide and other toxic gases to carry out optimisation and EPA compliance testing
http://www.habmigern2003.info/

Redskye Technology Ltd
Suppliers of Power Analysers and Cable Fault Locators. Service, Repair and Calibration of Power Analysers and Cable Fault Locators
http://www.redskye.co.uk

Frequency Selection Database
Resource for USA frequency coordination and spectrum research.
http://www.spectrumwatch.com

Luff Research Inc.
Manufacture high performance RF frequency synthesizers and phase-locked frequency sources.
http://www.luffresearch.com/

ZZAP Elektronik d.o.o.
frequency converter, power supply, radio frequency reader, frekvencijski pretvaraci, izvori za napajanje, ups, radio frekvencijski citac, web design, web dizajn, electronic components, elektronicke komponente, konzalting, consulting, internet
http://www.zzap-elektronik.com

Liteline Electronics
Lightline Electronics, products for the motion picture industry. Maker of the CineSpeedMeter2 and other precision frequency measurement products.
http://www.lightlineelectronics.com

Liteline Electronics
Lightline Electronics, products for the motion picture industry. Maker of the CineSpeedMeter2 and other precision frequency measurement products.
http://www.lightlineelectronics.com

Elmika Microwave Technologies
Sweep oscilators, scalar and vector analizers, frequency converters, attenuators, frequency meters and waveguide components.
http://www.elmika.com/

References on Zipf's Law
An academic bibliography on this relation between a word's frequency in a text and its place in a ranking of words by frequency. Includes some online texts.
http://www.nslij-genetics.org/wli/zipf/index.html