3-D Vector and Matrix calculation software for Mac?

[Bin Xia]

Hello there,

I'm looking for some information about certain kind of software package which
could do 3-D vector and tatrix calculation on Macintosh. One important feature
I need is that I could call the functions in this package, and connect it int
o my own program.

Any information or comments is welcome. If you have some experience on certain
package for PC, I'm also interested.

Bin XIA
Center for Locomotion Studies
Penn State University