""Raspberry Pi", an ultra-compact and inexpensive board-type computer, and total sales volume in the world exceeds 19 million units, and it is popular"

Yes. Yes.

"You can use it as a full-scale personal computer, even the size of the business card on your hand, enjoy with electronic work and programming teaching materials with your child. After that, you can assemble multiple electronic parts to make audio remote control and AI speaker.Depending on your idea, the applications are infinite."

Well, I think I agree with the point. But we should pay attention for this article.

"Raspberry Pi" gives us a lot of fun, however it is not easy.

I don't think that people who don't know the minimum set of UNIX command, the ways to get software packages of the latest Linux distribution, the concepts of process, thread, and socket, can use "Raspberry Pi" from the beginning.

-----

Previously, as soon as I announced "I want to do experiments using multiple Raspberry Pi, so please lend me your unused Raspberry Pi", some younger researchers in our Lab. thankfully offered several units immediately.

Of course, they who borrow their Raspberry Pi, are novel research engineers. They possess the ability to lightly hack one or two computers easily (I hope it).

Even they are so, I think that 'Raspberry Pi' is not easy, as they can be played with a little bit.

(By the way, at the three places of Kagoshima, Nagoya, and Tokyo, the Raspberry Pis work well in operation for 24 hours non-stop test)

-----

If this my image is described in inequalities,

"To use the office on Windows" <<<<< "To build a system with Raspberry Pi"

-----

So I come to think,

"Parent-child who does not know the concept of command line interface (CLI)"

What on earth can they do?