Circuit analysis.
Evaluation: sim, psim, both managed for
multi-processing by msim.
Parameter Finding: param, with help from
names, solver, sse, and timing.
Models: diode and mosfet,which uses diode for its body
diode.
Support Staff: tools, plot, wire, and fixture.
You'll probably use sim a lot on its own,
and param to model
new components via the pf -> scripts.paramfind
entry point.