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Flashback to 1977. The Apple II goes on sale, the IBM PC is still 4 years in the future, and it’s Dan's first year of med school. His dream is to master medicine. He spends his days pouring over textbooks and journals. To his chagrin, Dan soon realizes the knowledge is too vast for the human brain (or mine, at least) to store and process optimally. And so a new dream is born: to harness the emerging power of computers to help doctors master the ever-evolving body of knowledge required to practice best medicine.

In 1991 Dan founded Challenger Corporation, the first company to provide personal computer training, self-assessment, and boards preparation for physicians. Today, Med-Challenger remains the leader in this field, with a broad array of programs for physicians, physician assistants, nurses, nurse practitioners, medical students, and healthcare organizations.