The Wikidata data model and your SPARQL queries (2017-04-23) Reference works to get you taking advantage of the fancy parts quickly.
Wikidata's excellent sample SPARQL queries (2017-03-26) Learning about the data, its structure, and more.
Getting to know Wikidata (2017-04-23) First (SPARQL-oriented) steps.
Brand-name companies using SPARQL: the sparql.club (2017-01-22) Disney! Apple! Amazon! MasterCard!
A modern neural network in 11 lines of Python (2016-12-22) And a great learning tool for understanding neural nets.
Latest: Learning SPARQL from O'Reilly.
Logo for Kids I was thinking about writing an introduction to programming for middle school kids using the Logo programming language. After writing about 90 pages and deciding not to pursue it, I've made an Acrobat file of what I did do available for anyone who can use it.
Operating Systems Handbook Wouldn't "Working knowledge of UNIX, VMS, OS/400, VM/CMS, and MVS" look great on your resume? Formerly a $49.50 hardcover from McGraw-Hill; now a set of Acrobat files free for you to download!
datascienceglossary.org, a site I maintain
rdfdata.org: A directory of publicly available collections of RDF and web services that return RDF.
XSLT 2.0 articles: XML.com has a complete list of my Transforming XML columns about XSLT; for people interested in learning about XSLT 2.0, I've created a separate list showing just the articles covering the new features and other issues.
Microdata tests: Potrzebie Moses Schliessen Fangio