How many U.S. scientists do biomedical research?
Once you have that list, you can grab a prospectus for each company detailing its research focus. Financial reports detail R&D expenditures, a percentage of which is devoted to IT purchasing. Clinicaltrials.gov offers a list of clinical trials, phases and the companies running them. If your software targets a specific research market, you can use the clinical trial list to concentrate your marketing to a group of start-ups, mid-range and larger biopharmaceutical companies.