Prologue 4

Chapter 1 Orientation
1-1.
Why do you keep telling me to learn Python? (feat.
Learn C language and Java) 14
1-2.
The first thing you need to know is not a 'programming language' 21

Chapter 2 Programming Languages ​​& Operating Systems (OS)
2-1.
Programming languages ​​are 'languages'? (I don't understand...) 32
2-2.
What are developers doing sitting around (but they're hitting something...) 37
2-3.
Why are there so many? (C language, Java, Python, etc.) 41
2-4.
Have you ever bought a computer? (Computer Components) 47
2-5.
Why are these stories so unfamiliar to us? 51
2-6.
55 Reasons Why We Should Install the Latest Version of Java

Chapter 3 Network, Client, and Server
3-1.
Stories from Elementary School and Primary School Days, Part 62
3-2.
What Happens When You Download and Run KakaoTalk on the Han River 66
3-3.
You keep asking for something, and someone keeps giving it to you 70
3-4.
What the heck is Ubuntu? 75
3-5.
84 Reasons Why Running a Private Server Is Hard

Chapter 4 API and JSON
4-1. What is POST and what is GET? (feat.
Developer's Password) 90
4-2.
Format 104 for exchanging requests and responses
4-3. Reviewing the API Documentation 112

Chapter 5 Applications
5-1.
Features of the application that runs after installation 120

Chapter 6: Web
6-1.
What is the web made of and how does it work? 128
6-2.
143 Reasons Why Web Development Can't Work
6-3.
If I code reactively, will it be more expensive? (What is that?) 148
6-4.
We're talking about applications, so why do you keep telling me to talk to web developers? 153

Chapter 7 Databases and Image Processing
7-1.
Think of a shopping mall.
What on earth is the data here? 162
7-2.
What is that thing that the client is holding? ("It's stored in the client.
"Cla has it") 169
7-3.
I'm trying to change the banner, but he keeps telling me not to tell him.
(Why do people keep changing...) 175

Chapter 8 Frameworks and Libraries
8-1.
Cocoa? You eat that.
And why do we keep talking about libraries? (Frameworks, Libraries) 186

Chapter 9: Collaboration, Source Control, and Design
9-1.
Commit? Merge? What? 198
9-2.
'Why do you say that...
Did the two fight?'(feat.
Designers and Developers) 204

Chapter 10 Summary
10-1.
What Happens When You Start Developing 214
10-2.
Outro 222

Appendix - Analyzing Services Through API Documentation 226

hello.
My name is Wonyoung Choi, and I am a planner, developer, and instructor who is preparing to launch an educational service called Gipp.
When I first started planning in 2012, I was a business administration graduate who knew nothing about IT.
The developer I met at that time was very kind and tried to teach me a lot.
But unfortunately, I couldn't understand.
So I asked people.

“What exactly do I need to study and how much do I need to study to become a planner who can communicate effectively?”
People told me to learn C.
I told you to study Java.
These days, there is a magic word.
It's Python.
Perhaps some of you have heard that you should study Python, or perhaps you have studied it yourself.
So I thought that was what I had to do.
I started studying Java.
I taught myself HTML, CSS, JSP, etc.
Then, by chance, I entered a school called NHN NEXT.
There, I met such great professors and colleagues that I started learning C language again.
I studied database (DB), web, server, Android, and iOS.

And then I started planning again.
But while planning, I have never used if statements.
I learned about loops, but I've never used them while planning.
I thought about it then.

'The knowledge that a planner needs to know is not Python (a programming language).
'A planner must understand the big picture.'
I wrote "Understandable IT Knowledge for Non-Majors" in the hope that others won't have to go through the same trial and error I did.
I hope this book will be helpful to everyone working with developers in the field.

Besides office workers, there are other people who definitely need this book.
These are parents with children.

Most parents these days teach their children coding.
But this is like not seeing the forest for the trees.

Unless your child is going to be a developer, mastering a single programming language, whether Python or C, won't help much.
Because new programming languages ​​are constantly being created.


The important thing is to understand the overall big picture of IT, including how networks, clients, servers, APIs, apps, web, and data are organically interconnected.
Only then can you develop into a future talent capable of communicating with developers.

So, before studying the tree (coding), it is necessary to first be able to see the big forest (the big picture of IT).
To achieve this, parents must also understand the big picture of IT.

IT knowledge that anyone can understand.
Still, a sufficient depth of knowledge.
I will explain it to you in an easy and fun way.
After reading this book, at some point you will begin to understand what the developers are saying.


"Oh, that requires the server to send an image URL, but the API seems incomplete. The JSON is missing only the icon URL."
I set the client to display the default value if the URL does not come.
But I made it randomly, so it might look a little weird.”

Let me make sure you fully understand what I mean.