Apex Microtechnology
Produces monolithic and hybrid high voltage and high power operational amplifiers, pulse width modulation (PWM) amplifiers, and motion control products.
http://eportal.apexmicrotech.com/mainsite/

OpAmps
Operational Amplifiers Use & Operation
http://www.williamson-labs.com/480_opam.htm

Advanced Monolithic Systems, Inc
Produces operational amplifiers as well as ICs for power supply design (DC converters and voltage regulators, references, and detectors).
http://www.advanced-monolithic.com/

Matisse
Makes mono block and stereo amplifiers, pre-amplifiers, phono pre-amplifiers and cables.
http://www.signatureaudio.com/matisse.html

Advantech
Manufacturer of Solid State High Power Amplifiers (SSPA) and Low Noise Amplifiers (LNA) and associated redundancy equipment. Also manufactures broadband amplifiers and multiplexers.
http://www.advantech.ca/

Gorman Health Group
Gorman Health Group provides counsel, products, and services to Medicare and Medicaid's private sector partners. It also provides industry leading managed care products, such as Medicare Training Academy (MTA), eLead, MIDAS, Medicare Sales Training and Certification, Health Care Concierge (HCC), B vs. D Navigator, and COMPASS.
http://www.gormanhealthgroup.com/

Mapletree Audio Design
Manufacturers of stereo and multi-channel tube audio amplifiers, line pre-amplifiers, headphone/phono amplifiers and line router.
http://hollowstate.netfirms.com/

Advanced Linear Devices, Inc.
Advanced Linear Devices Inc. specializes in low power precision linear integrated circuits and board level products; products include Electrically Programmable Analog Devices, MOSFETs, op amps, dual slope A/D front end converters, Digital Voltmeter boards and chip-sets, voltage comparators, analog switches, timers and matched transistor pairs.
http://www.aldinc.com/

Operational Innovations, Inc.
Consulting firm specializing in project management, technical and operational services for the food, beverage and consumer goods industries.
http://www.op-in.com/

OpteBiz
Providers of Manufacturing Execution Systems for enterprise and operational integration, operational intelligence solutions and business and technology consulting service.
http://www.optebiz.com/