University of Michigan outdoes IBM with world's smallest 'computer' - CNET
By A Mystery Man Writer
The computer, which can stand on the tip of a grain of rice, is one-tenth the size of IBM's version.
Researchers develop the world's smallest computer, smaller than a grain of rice
World's Smallest Computer
What is the smallest (bitwise) CPU that any version of Unix has ever been implemented on? - Quora
Microcontroller - Wikipedia
What is the smallest CPU currently? - Quora
An even smaller world's smallest 'computer' - Michigan Engineering News
Michigan Micro Mote (M3) makes history as the world's smallest computer
Michigan Micro Mote (M3) makes history as the world's smallest computer
What is the smallest (bitwise) CPU that any version of Unix has ever been implemented on? - Quora