% language=uk \startcomponent introduction \environment mk-environment \chapter{Introduction} In this document I will keep track of the transition of \CONTEXT\ from \MKII\ to \MKIV, the latter being the \LUA\ aware version. The development of \LUATEX\ started with a few email exchanges between me and Hartmut Henkel. I had played a bit with \LUA\ in \SCITE\ and somehow felt that it would fit into \TEX\ quite well. Hartmut made me a version of \PDFTEX\ which provided a \type {\lua} command. After exploring this road a bit Taco Hoek\-water took over and we quickly reached a point where the \PDFTEX\ development team could agree on following this road to the future. The development was boosted by a substantial grant from Colorado State University in the context of the Oriental \TEX\ Project of Idris Samawi Hamid. This project aims at bringing features into \TEX\ that will permit \CONTEXT\ to do high quality Arabic typesetting. Due to this grant Taco could spent substantial time on development, which in turn meant that I could start playing with more advanced features. This document is not so much a users manual as a history of the development. Consider it a collection of articles, and some chapters indeed have ended up in the journals of user groups. Things may evolve and the way things are done may change, but it felt right to keep track of the process this way. Keep in mind that some features may have changed while \LUATEX\ matured. Just for the record: development in the \LUATEX\ project is done by Taco Hoekwater, Hartmut Henkel and Hans Hagen. Eventually, the stable versions will become \PDFTEX\ version~2 and other members of the \PDFTEX\ team will be involved in development and maintenance. In order to prevent problems due to new and maybe even slightly incompatible features, \PDFTEX\ version~1 will be kept around as well, but no fundamentally new features will be added to it. For practical reasons we use \LUATEX\ as the name of the development version but also for \PDFTEX~2. That way we can use both engines side by side. This document is also one of our test cases. Here we use traditional \TEX\ fonts (for math), \TYPEONE\ and \OPENTYPE\ fonts. We use color and include test code. Taco and I always test new versions of \LUATEX\ (the program) and \MKIV\ (the macros and \LUA\ code) with this document before a new version is released. It also means that there can be temporary flaws in the rendering. Keep tuned, \blank Hans Hagen, Hasselt NL,\crlf August 2006\endash\currentdate[year] \blank \type {http://www.luatex.org} \stopcomponent