Welcome to MDK. MDK stands for MIX Development Kit and provides tools for developing and executing, in a MIX virtual machine, MIXAL programs. The MIX is Donald Knuth's mythical computer, described in the first volume of _The Art of Computer Programming_ (Addison Wesley, 1997), which is programmed using MIXAL, the MIX Assembly language. Currently, MDK includes a MIXAL assembler, mixasm, and a MIX virtual machine, mixvm, with a command line interface. MDK is free software. Please see the file COPYING for details. For documentation, please see the files in the doc subdirectory. For building and installation instructions please see the INSTALL file. For sample MIXAL programs, please see the samples subdirectory. For translations (MDK uses GNU's gettext), please see the po subdirectory[0]. -- [0] New translations are welcome. If you'd like to contribute one, please contact the author, jaortega@acm.org.