It is pretty easy to print in windows, you only need to choose `print' from the `file' menu in any application. You can use Adobe Acroread to open and print PDF file, use GSview to open and print PS file, use notepad or wordpad to open and print any text file, .... This is almost also true in Unix, you can use acroread to open and print PDF file, gv command to open and print ps file, Netscape to print web pages. However, most applications under Unix provide command line options so that you can print directly from a command line. There are some Unix applications that can yield better printouts or help you save time or trees.