Allen Kent & James G. Williams 
Encyclopedia of Computer Science and Technology [PDF ebook] 
Volume 23 – Supplement 8: Approximation: Optimization, and Computing to Visual Thinking

"This comprehensive reference work provides immediate, fingertip access to state-of-the-art technology in nearly 700 self-contained articles written by over 900 international authorities. Each article in the Encyclopedia features current developments and trends in computers, software, vendors, and applications…extensive bibliographies of leading figures in the field, such as Samuel Alexander, John von Neumann, and Norbert Wiener…and in-depth analysis of future directions."