Cardionics is a manufacturer of medical electronic instruments specializing in the field of heart and lung sounds. The company is a Texas-based corporation which was founded in 1981. The officers have extensive experience in the medical field including general management, medical marketing, engineering and manufacturing. The company also has computer programming capability which is able to meet the customers' need. The experience of each officer ranges from 10 to 30 years in the medical industry. All products manufactured by Cardionics have also been designed by the company. The company markets its products worldwide. With this expertise, Cardionics is capable of designing and manufacturing specialized medical products to the customers' specifications and requirements. Cardionics Website

Challenger Corporation is a privately held firm specializing in the creation and distribution of high-quality clinical educational material to physicians throughout the United States and Latin America. The firm engages more than one hundred and forty physician editors, authors and reviewers nationwide, and addresses the educational needs of over 385, 000 domestic physicians. The Challenger clinical library contains over 1800 hours of CME content, and is the leading electronic source of preparation for specialty boards exams in several medical specialties. In October 2002, Challenger also entered the physician website hosting industry with its acquisition of, a major provider of physician web services to the primary care and obstetrics/gynecology physician communities. Challenger Website

CTRL Systems, Inc. is a high-tech manufacturer of ultrasound diagnostic sensors, sophisticated signal processing, and maintenance management software. The company provides practical and affordable solutions to engineering, operations, safety, quality control, and maintenance departments in all industries - including aerospace, aviation, health, petro-chemical, railroad, automotive, manufacturing, and the military. CTRL's growing reputation among these industries is built on its commitment to quality, and the company's philosophy of developing long-term relationships with its customers in order to better meet their specific needs. CTRL stands firmly dedicated to the advancement of new technologies that promote the effectiveness of reliability and maintenance programs. CTRL Systems Website