  We investigate the response of quasiperiodically driven nonlinear systems
exhibiting strange non- chaotic attractors (SNAs) to deterministic input
signals. We show that if one uses two square waves in aperiodic manner as input
to a quasiperiodically driven double-well Duffing oscillator system, the
response of the system can produce logical output controlled by such a forcing.
Changing the threshold or biasing of the system changes the output to another
logic operation and memory latch. The interplay of nonlinearity and
quasiperiodic forcing yields logic behaviour and the emergent out- come of such
a system is a logic gate. It is further shown that the logical behaviours
persist even for experimental noise floor. Thus the SNA turns out to be an
efficient tool for computation.
