The Universal Sets represent generic
Technic. These sets typically have no primary model, but have
full instructions for anywhere from 3 to 14 models using the same
parts. They vary from very simple with as few as 100 parts to
amazingly complicated with well over 1000 parts. In fact, the
Control Centers and Code Pilot are among the most complex Technic sets
there are and have no peers among the "normal" Technic sets.
Several sets feature motors and, in fact, Universal Sets were the only
sets to include motors for many years. Several sets also include
pneumatics, flex system, fiber optics, or other Technic special
features, especially the year these features were introduced.
My favorite non-motorized set is
8062.
Both Control Centers (
8094 and
8485) are among the best Technic sets there are,
and each model is good enough to have been sold on its own. The
8479 dump truck may be the best of all, and is
absolutely unique among all of LEGO
®.