  We introduce a class of quantum adiabatic evolutions that we claim may be
interpreted as the equivalents of the unitary gates of the quantum gate model.
We argue that these gates form a universal set and may therefore be used as
building blocks in the construction of arbitrary `adiabatic circuits',
analogously to the manner in which gates are used in the circuit model. One
implication of the above construction is that arbitrary classical boolean
circuits as well as gate model circuits may be directly translated to adiabatic
algorithms with no additional resources or complexities. We show that while
these adiabatic algorithms fail to exhibit certain aspects of the inherent
fault tolerance of traditional quantum adiabatic algorithms, they may have
certain other experimental advantages acting as quantum gates.
