Can anybody out there in VAXland explain in not-too-technical terms the
major similarities and differences between four-wheel drive and all-wheel
drive?

Owning a Jeep Cherokee 4 X 4, I am familiar with how this car performs in
snow and mud with all-terrain tires.  This "utility vehicle" has gotten
me out of plenty of sticky situations where another car would have easily
been stuck.  And no hassle with tire chains in the snow!  It's been great, but
it's time for a change and I'm considering several different options.

References to magazine articles or other literature would also be appreciated.

Thanks!

                                               --Linda