pst-labo provides macros for a variety of devices used mainly for chemical applications. Since most of these devices have a standardised design pst-labo spares you the trouble of having to create them manually. All basic objects are included in the file pst-laboObj.tex and are loaded during the start of pst-labo. Pay attention, that you cannot run the documentation with pdflatex, PSTricks is PosTScript Tricks. Use latex->dvips->ps2pdf or xelatex or lualatex hvoss@tug.org