The September 2017 Zillman Column features Web Data Extractors 2018 by Marcus P. Zillman, M.S., A.M.H.A.; Executive Director of the Virtual Private Library. Extracting data from the World Wide Web (WWW) has become an important issue in the last few years as the number of web pages available on the visible Internet has grown to billions of pages with over 1 trillion + pages available from the invisible web. Tools and protocols to extract all this information have now come in demand as researchers as well as web browsers and surfers want to discover new knowledge at an ever increasing rate! As robots (bots) and intelligent agents are at the heart of many extraction tools I decided to create a compilation of the latest sources and sites that extract information from the web. Download this excellent freely available 22 page 209KB pdf column today. This is another MUST have column to discover the latest web data data scrapping and data extractors to give you the data you need in today's ever changing business and academic world!!