Structure and Interpretation of Computer Programs in Visual Language Zed

ZED is a highly readable yet concise language, somewhat resembling Scheme. It is a small language, allowing for complete mastery, and remains simple without sacrificing expressiveness. ZED is truly general purpose and elegantly handles: high level, low level, multi-threaded, functional, imperative, object oriented, and logic style programming! (The last two will be covered thoroughly in a future edition of the book). ZED's simplicity and versatility are partially due to innovations in the textual elements of the language and partially due to the visual elements of the language which are modifications of what are known as 'structured flowcharts'. Programs written in ZED are beautiful to look at and may be executed efficiently by machine. This book is a tutorial introduction to ZED, arranged as a single, long, but well documented visual program. The book, in combination with Sussman/Abelson provides a basis for the construction of this new language.