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.