Fixed a problem that will not start up at iOS7 or Later.
I utilize "a fermi estimate" for problem solving
"JiatamaRyoku" is the capability to carry out logical thinking. This book describes the training method of "JiatamaRyoku".
Caution:This book is Japanese.
- July 16, 2011 Price increase: $13.99 -> $17.99
- October 10, 2014 New version 5.0