I feel certain that Ziegler's Fig. 2.1 below (to which I assume you are referring?) was just drawn "by hand" in a generic drawing program, such as Adobe Illustrator, or xfig. <br /> ![Fig. 2.1][1] <br /> <sub>(p.643 = 27th page of notes linked by Camilo)</sub><br /> This is probably not what you want, but Mathematica (via Combinatorica) can draw Hasse diagrams. See, e.g., [this link][2] for how to accomplish this. <br /> ![alt text][3] [1]: https://i.sstatic.net/odMnq.jpg [2]: http://demonstrations.wolfram.com/HasseDiagramOfPowerSets/ [3]: https://i.sstatic.net/afZJS.jpg