From Longman Business Dictionary
pioneerpi·o·neer /ˌpaɪəˈnɪə-ˈnɪr/ noun [countableC] the first person or organization to do something that other people and organizations later develop or continue to dopioneers willing to try a new software product and lead others to it
pioneer ofVictor Co. of Japan, pioneer of the videocassette recorder
pioneer inKentucky Fried Chicken, one of the pioneers in the fast-food business
—pioneer verb [transitiveT]The company pioneered video games in the early 1970s.
—pioneering adjectiveadja pioneering disk-drive maker