1. A capacitive crossbar array ( 100 ) comprises: a first set of conductors ( 102 ); a second set of conductors ( 104 ), the first set of conductors ( 102 ) intersecting the second set of conductors ( 104 ) to form crosspoints; a nonlinear capacitive device ( 106 ) interposed between a first conductor ( 103 ) within the first set ( 102 ) and a second conductor ( 105 ) within the second set ( 104 ) at a crosspoint; the nonlinear capacitive device ( 106 ) being configured to store information which is accessible through said first conductor ( 103 ) and said second conductor ( 105 ).