Finding the right font for an application seems to be an art.
There seem to be many standards.
Arial seems to be used in most applications I have seen,
Segoe UI is the standard for
Microsoft Windows and
Verdana seems to be everywhere on the web
What is the best font in sense of
- availability on different windows platform
- other reasons that I have not considered here
Please note that I'm not interested in "taste" answers, but objective reasons to choose one font. There are people out there that have lot of experience in user interface design and have answered this question for themselves through a process of comparison and balancing reasons for one font against another.
What I want to know is: Which font to choose, what else should be considered in means of accessability.