When you use Subtraction, you don’t always have to eliminate the component. There is also what we call “Partial Subtraction.” It is a valid technique as long as the product or service that remains delivers a new benefit. To deploy Partial Subtraction, you pick a component and then eliminate a specific feature of that component. Consider the case of Twitter, a microblogging application used by hundreds of millions of people worldwide. By simply restricting each tweet to 140 characters, Twitter has become a vast digital conversation about what individuals around the globe are thinking and doing. A Partial Subtraction of the traditional blog down to 140 characters dramatically increased the volume of and participation in this Internet phenomenon. How did it happen?