The Last Four Flatteners

The last four flatteners Friedman talks about are those below:

Supply chaining
Comparing the modern retail supply chain to a river, the author explains supply chaining.
Using technology to improve sales and shipping, the author argues how technology can help getting a better scale in the field of marketing.

Insourcing
Doing a work of a company instead of another company in the world is the depth of insourcing. Friedman gives Toshiba Company as an example. The example briefly and explicitly explains the topic regarding Insourcing.

In-forming
Using the Google company and other search engines as example, Friedman tells how it is amazing to share the information through the Internet. He also argues that the rate of the internet users is souring day after day. It, indeed, greatly helps people in the world to find information as never the world seen it before.

The steroids
Friedman explain that having many digital and personal devices like mobile phones, iPods, and etc, greatly help to facilitate the personal staff. For example, using a cell phone, man can do everything in personal and in a greatly and never-expected speed with accuracy.