The ACE Programmer’s Guide: Practical Design Patterns for Network and Systems Programming:

This book teaches you about ACE: a bit of its history and approach to development, how it’s organized, how to begin using it, and also how to use some of its more advanced capabilities. We teach you how to do things the ACE way in this book, but we could not possibly fit in a complete reference. Use this book to get started with ACE and to begin using it in your work. If you’ve been using ACE for a while, there are probably descriptions of some capabilities you haven’t seen before, so the book is useful for experienced ACE users as well.

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