A 3D semiconductor device, the device including: a first level including first single crystal transistors; and a second level including second single crystal transistors, where the first level is overlaid by the second level, where the first level includes a transferred layer and a bonded layer, where the second level is bonded to the first level, where the bonded second level includes oxide to oxide bonds, where the bonded second level includes metal to metal bonds, where the first level includes memory periphery circuits, where the second level includes a plurality of memory cells, and where the first level includes at least one Look up Table (“LUT”) circuit.