Clipper Tutorial: A Guide to Open Source Clipper(s) is an informative book that teaches readers about the Clipper programming language, its open-source variants, and how to use them effectively.

The book starts by introducing Clipper, a programming language that was widely used in the 1980s and 1990s for developing business applications. Despite the emergence of newer programming languages, Clipper remains popular among developers due to its ease of use and compatibility with many operating systems.

The authors then dive into the world of open-source Clipper alternatives, such as xHarbour and FlagShip, which have emerged in recent years. These alternatives provide modern features and enhancements to the Clipper language, allowing developers to create even more robust applications.

The book provides an in-depth guide on how to install and configure the various open-source Clipper alternatives, including xHarbour and FlagShip, on different operating systems. The authors provide detailed instructions for each step, making it easy for readers to follow along.

Furthermore, the book includes numerous examples of real-world applications built using Clipper and its open-source variants. These examples showcase the versatility of the language and how it can be used to develop a wide range of applications, from simple utilities to complex business systems.

Throughout the book, the authors provide tips and tricks for optimizing Clipper code and improving application performance. They also address common errors and issues that developers may encounter when using Clipper and its open-source variants.

In summary, Clipper Tutorial: A Guide to Open Source Clipper(s) is an essential resource for anyone interested in using Clipper or its open-source alternatives for application development. The book is well-written, comprehensive, and provides practical guidance that will help readers get up and running with the language quickly. Whether you are a seasoned developer or a beginner, this book is a must-have for your programming library.