For documentation: If you want to read any of the Unix library instructions, you can open the Terminal application. Type "man curl" and you will get the manual for the curl function. There is an app called "iMan" which does a nice job of showing manual pages in a more readable format, and can search for manuals or show variations of similar libraries (http://iman-macosx.sourceforge.nethttps://sourceforge.net/projects/iman-macosx).