Do you speak "business" or "IT"? Perhaps you speak a little of both. In today's connected world, where business and IT are fused, chances are that if you're a business or IT executive, or someone working to transform a business, you speak a little of both. But what if there was a "third" language? A common language that was natural for both "business" and "IT," straightforward enough to use, yet sophisticated enough to work in today's connected world? What if such a language only comprised a handful of words? With such a language, the "loss in translation" between the business and IT would happen less, because both would be using the same language. With such a language, business outcomes and transformations would become much more achievable. This handbook describes what this language is-the language of Information Systems for the 21st century.