TeX4ht: HTML production ----------------------- TeX4ht is a highly configurable system for producing hypertext from TeX-based sources. The system is distributed with a large set of configuration files. The most commonly used configurations are those supporting LaTeX inputs and HTML, MathML, OpenOffice, and DocBook targets. The first part of the presentation will describe how the system can be used for different applications. ConTeXt is a new addition to the style files being supported by TeX4ht. The second part of the presentation will describe the work done to provide TeX4ht configurations for ConTeXt, with the objective of providing an insight into the inner working of TeX4ht.