Apple has been steadily placing the A4 chip in all of its iOS-based devices including the iPhone 4, the , the , and the .

Zoom out from the processors and you can take a look at the logic board for each device. The iPhone 4's logic board houses 512MB of RAM and either 16GB or 32GB of Flash storage (depending on the model), as well as the iPhone 4's three-axis gyroscope and GPS chip, according to .

The 128K's much larger logic board contains just 128KB of RAM, 64KB of read-only memory (ROM), and no internal storage. The Macintosh logic board measures 8.75 inches by 8.75 inches, according to , a New Jersey-based classic computer reseller. To put that size into perspective, you could fit about 7.37 iPhone 4 units onto the surface area of the Macintosh 128K logic board.

In lieu of a hard drive, the 128K relied on 3.5-inch floppy disks that had a maximum memory of 400KB. A single disk had enough space to house the operating system (), one application (), and some user-generated files.