what is the term which differentiate the Apple A7 and Apple A8 system on a chips?
Apple A7 The Apple A7 is a 64-bit system on a chip (SoC) designed by Apple Inc. It first appeared in the iPhone 5S, which was introduced on September 10, 2013. Apple states that it is up to twice as fast and has up to twice the graphics power compared to its predecessor, the Apple A6. While not the first 64-bit ARM CPU, it is the first to ship in a consumer smartphone or tablet computer.
PowerBook 3400c The PowerBook 3400c is a laptop computer in the PowerBook line manufactured by Apple Computer from February to November 1997. It was, briefly, the swiftest laptop in the world. Using the PowerPC 603e processor running at speeds of up to 240 MHz, this PowerBook was the first to feature a PCI architecture, EDO memory, and a 64-bit wide, 40 MHz internal bus. It was also the first PowerBook to feature a PC card slot capable of being used as a zoomed video port. Like all Apple laptops since the PowerBook 500 series, it featured a built-in trackpad as the pointing device.