Spacetime Algebra is also known as Clifford Algebra and Geometric Algebra.
It allows some important physics equations to be expressed in simple form. We have been promised that Spacetime Algebra will reduce the barrier between classical and quantum mechanics.
The entire physics curriculum can be unified and simplified by
adopting STA as the standard mathematical language. -David Hestenes
Vectors have four components, three for space and one for time. For now, we propose (x,y,z,t).
Rob Sterling 