LaTeX: Default font(s) for greek letters?

I'm a programmer but new to (La)TeX. As far as 开发者_如何学PythonI can tell, neither the Computer Modern nor Latin Modern fonts have glyphs for the full greek alphabet.

I installed (OS X) a Latin Modern font that came with TeX Live (lmroman10-regular.otf). As you can see in the attached image, the lowercase greek letters (and nabla) are displayed (TextEdit) using some default font.

Also shown in the image is LaTeXiT displaying pretty lowercase greek letters that seem to be Latin-Modern-Italic-ish.

So what font(s) are used by LaTeX for greek (and math symbols)? Where would I find them in the TeX fonts directory?

Image:

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My TeX distro came with the following Computer Modern font collections (Adobe Type 1): cm, cm-extra, cm-lgc, cm-super, and cmcyr.

I was only able to install (Windows 7) and inspect (charmap) the files in the first two collections. I didn't find the greek lowercase alphabet anywhere, although it's probably there somewhere.

After some Googling, I found cm-unicode which is exactly what I needed.