Leslie F. Sikos, Ph.D.

Leslie F. Sikos, Ph.D. is a computer scientist specializing in web standards, Responsive Web Design, Semantic Web technologies, and Web accessibility. Being a hand coder Web standardista and senior web designer, he is particularly interested in the Open Web Platform and Web Quality Assurance through standards-based web design and web site optimization. Living on the cutting edge of web technologies, he prides himself on creating stunning, well-structured, mobile-friendly web sites with excellent User Experience. Dr. Sikos is the author of 13 computer books covering a wide range of topics including XML, XHTML5, CSS3, jQuery, Flash, digital photography, image processing, video authoring, and computer hardware. Due to his pedagogical background, he can introduce technical terms and explain complex development issues in plain English. His web design book Web Standards is an Amazon.com best seller.
Dr. Sikos is a member of several professional organizations, including the World Wide Web Consortium, the Internet Engineering Task Force, the Internet Society, and the Unicode Consortium. He is also an invited editor and reviewer actively contributing to the development of open standards, and regularly work with the world’s leading publishing experts from Springer and Apress.



  • Website standardization in development and redesign according to all major recommendations and standards.
  • Responsive Web Design for resolution-independent, mobile-friendly website development and maximized interoperability.
  • Web accessibility to provide websites available to anybody, including people with disabilities. WCAG 1.0 at all priority levels (1, 2, 3), WCAG 2.0 at all conformance levels (A, AA, AAA), and Section 508.
  • Semantic Web to make web pages meaningful to automated software agents. Semantic annotations, knowledge representation with RDF, OWL, and SKOS, and the implementation of knowledge organization systems such as controlled vocabularies and ontologies, ontology engineering, converting unstructured web contents to structured data, especially Linked Open Data and Linking Enterprise Data, manually adding RDFa, HTML5 Microdata, and JSON-LD machine-readable metadata annotations to the XHTML5 markup.

Key Achievements

  • Invited reviewer, Journal of Accessibility and Design for All, 2012
  • #2 best seller on Amazon in XML programming, 2012
  • #3 “most wished for” book on Amazon in XML programming, 2012
  • 13 computer books, many of which are used as university textbooks, since 2004
  • Government Scholarship for Ph.D. studies, 2006–2009
  • Invited reviewer, Elsevier, 2009
  • Article amongst the Top 25 Hottest Articles, ATE, 2009
  • Most voted macro photograph, Canon photo competition “The Assignment”, 2008