Hello dear R, I dont have specific task on mind just learning R. 1) Is it possible to open a document for example path1\myfile.pdf with program path2\pdfviewer.exe ? How would I do it in win? Does it differ in linux? 2) Is it possible to run a program and supply to it some streams? The streams are for example txt file or web address. One specific task which comes to mid: I would like to draw in inkscape programmatically with script. Is it somehow possible? Thank you very much for any help in advance. [[alternative HTML version deleted]]