Buy article online - an online subscription or single-article purchase is required to access this article.
computer programs
Computer programs to project crystal packing along any of the three crystallographic axes [Chacko & Varughese (1976). J. Appl. Cryst. 9, 508-509] and to obtain a perspective view of a single molecule [Cole & Adamson (1969). Acta Cryst. A25, 535-539] have been reported. A new computer program to obtain molecular illustrations as line diagrams or perspective views with an option for stereo pairs is presented. The program allows projection of a molecule or unit-cell contents along any desired direction. It has been written for a small (8K)-memory IBM 1130 computer system where Johnson's [Rep.ORNL-3794. (1965). Oak Ridge National Laboratory, Tennessee] ORTEP cannot be accommodated and can be easily adapted to any system supporting Fortran IV.