Business-to-Customer
Business to consumer (B2C) refers to the transactions conducted directly between a company and consumers who are the end-users of its products or services.

Business-to-Business
Business-to-business (B2B or, in some countries, BtoB) refers to a situation where one business makes a commercial transaction with another.

Trading
Trading is an active style of participating in the financial markets that seeks to outperform traditional buy-and-hold investing.