If in Windows, the default installation directory for programs is the environment variable $ProgramFiles or commonly C:\Program Files on most systems, what is the equivalent path / folder of that to Linux and Mac OS X systems? Are the installation styles different on each platform? I would just like to know because I don't own a Mac yet and even if I do have Ubuntu installed in my computer, i'm not yet literate about the go-arounds of Linux.
Please shine some light into my topic...
