Technology has significantly changed the way businesses operate in several key ways. Computers now form the basis of most business operations, allowing work to be done digitally. Radio frequency identification (RFID) technology is also transforming businesses through more automated tracking of inventory and tighter security measures. The internet in particular has revolutionized business by allowing small businesses to start up and reach customers more cheaply online, though online operations require attention to security, privacy, and legal issues. Targeted online advertising now also allows precise targeting of potential customers.