#1. LinkedIn LinkedIn is a business-related social networking site & mainly used for professional networking. #2. Apple Apple Inc.is an American multinational corporation that designs and sells consumer electronics, computer software, and personal computers. #3. Qlik Technologies QlikTech is a business intelligence (BI) software company based in Radnor, Pennsylvania. #4. Athenahealth athenahealth, Inc. is a publicly traded American company that provides physician practices with online practice management and electronic medical record software, combined with medical billing and other healthcare business...