Arial is everywhere. If you don't know what it is, you don't use a modern personal computer. Arial is a font that is familiar to anyone who uses Microsoft products, whether on a PC or a Mac. It has spread like a virus through the typographic landscape and illustrates the pervasiveness of Microsoft's influence in the world.
Arial's ubiquity is not due to its beauty. It's actually rather homely. Not that homeliness is necessarily a bad thing for a typeface. With typefaces, character and history are just as important. Arial, however, has a rather dubious history and not much character. In fact, Arial is little more than a shameless impostor.
I found the article very interesting considering the typefaces we use, it remind me of the brief we had to do in our first year. In the article they compare the usage of Arial on PCs and Helvetica typeface on Mac computers.
The rest of the article could be found in this website: http://www.ms-studio.com/articles.html