英語 English：Shell
日語 Japanese：シェル (しぇる)
類義 Synonym：Shell script Command line Terminal Character user interface
意味 Meaning：The shell is a computer word for an application that gives commands to the operating system.
Since the shell manipulates the Kernel (core of the OS), consumers rarely use the shell. However, professional developers must have basic knowledge of the shell.
In simple terms, the shell is a tool for administrators to control the OS.
解説 Commentary：
The shell is a concept, and well-known implements are Windows Powershell, Windows Command Prompt, Linux Bash, and Mac Terminal.
In everyday conversation, the generic noun "shell" and the specific product name "command prompt" are often used interchangeably. This is like calling soy sauce a Kikkoman; it is a kind of metaphor.
Shell operates mostly through CUI (Character User Interface), not GUI (Graphical User Interface). Since the shell does not run with a mouse or a click, beginners are overwhelmed at first.
The shell has its own logical language. Once you get used to it, you can get the most out of your computer.
シェルまとめ Shell list：
| Shell | シェル |
|---|---|
| Windows Command Prompt | ウインドウズコマンドプロンプト |
| Windows Powershell | ウインドウズパワーシェル |
| Linux Bash | リナックスバッシュ |
| Mac Terminal | マックターミナル |