ManufacturerFoxconn, Pegatron[1]Product familyiPadTypeTablet computerRelease date1st generation: November 2, 20122: November 12, 20133: October 22, 20144: September 9, 2015Operating systemiOSSystem-on-chipused1st generation: Apple A5( 2nd generation: 32nm) 2 & 3: Apple A7( withApple M7motion co-processor) 4: Apple A8( withApple M8motion co-processor) CPU1st generation: 1 GHz dual-core ARMCortex-A92 & 3: 1.3 GHz dual-core Apple Cyclone4: 1.5 GHz dual-core Apple TyphoonMemory1st generation: 512 MBDDR2RAM2 & 3: 1024 MB LPDDR3 RAM4: 2048 MB RAMStorage1st generation: 16, 32, or 64 GBflash memory2: 16, 32, 64, or 128 GBflash memory[2]3 & 4: 16, 64, or 128 GBflash memoryDisplay7.9-inch( 200.66 mm) diagonal LED-backlit Multi-Touch display with IPS technology, at 4: 3aspect ratio1st generation: 1024×768 pxat 163ppi2, 3 & 4: 2048×1536 pixels at 326 ppi( Retina Display) Graphics1st generation: PowerVRSGX543MP22 & 3: Quad-core PowerVR G64304: Quad-core Power