diff --git a/README.md b/README.md
index 599571a..d7e9f6c 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@
 * [BitTorrent Client](#build-your-own-bittorrent-client)
 * [Blockchain / Cryptocurrency](#build-your-own-blockchain--cryptocurrency)
 * [Bot](#build-your-own-bot)
+* [Command-Line Tool](#build-your-own-command-line-tool)
 * [Database](#build-your-own-database)
 * [Docker](#build-your-own-docker)
 * [Emulator](#build-your-own-emulator)
@@ -97,6 +98,11 @@
 * [**Python**: _Creating Reddit Bot with Python & PRAW_](https://www.youtube.com/playlist?list=PLIFBTFgFpoJ9vmYYlfxRFV6U_XhG-4fpP) [video]
 * [**R**: _Build A Cryptocurrency Trading Bot with R_](https://towardsdatascience.com/build-a-cryptocurrency-trading-bot-with-r-1445c429e1b1)
 
+#### Build your own `Command-Line Tool`
+
+* [**C**: _Rewriting the cat command from scratch_](https://learnto.computer/screencasts/bsd-cat) [video]
+* [**Go**: _Visualize your local git contributions with Go_](https://flaviocopes.com/go-git-contributions/)
+
 #### Build your own `Database`
 
 * [**C**: _Let's Build a Simple Database_](https://cstack.github.io/db_tutorial/)
@@ -347,14 +353,12 @@
 * [**C**: _The very basics of a terminal emulator_](https://www.uninformativ.de/blog/postings/2018-02-24/0/POSTING-en.html)
 * [**C**: _Write a System Call_](https://brennan.io/2016/11/14/kernel-dev-ep3/)
 * [**C**: _Implementing a virtual machine in C_](https://felixangell.com/blog/implementing-a-virtual-machine-in-c/)
-* [**C**: _Rewriting the cat command from scratch_](https://learnto.computer/screencasts/bsd-cat) [video]
 * [**C++**: _Build your own VR headset for $100_](https://github.com/relativty/Relativ)
 * [**C++**: _How X Window Managers work and how to write one_](https://seasonofcode.com/posts/how-x-window-managers-work-and-how-to-write-one-part-i.html)
 * [**C++**: _Writing a Linux Debugger_](https://blog.tartanllama.xyz/writing-a-linux-debugger-setup/)
 * [**C++**: _How a 64k intro is made_](http://www.lofibucket.com/articles/64k_intro.html)
 * [**C#**: _C# Networking: Create a TCP chater server, TCP games, UDP Pong and more_](https://16bpp.net/tutorials/csharp-networking)
 * [**Clojure**: _Building a spell-checker_](https://bernhardwenzel.com/articles/clojure-spellchecker/)
-* [**Go**: _Visualize your local git contributions with Go_](https://flaviocopes.com/go-git-contributions/)
 * [**Java**: _How to Build an Android Reddit App_](https://www.youtube.com/playlist?list=PLgCYzUzKIBE9HUJU-upNvl3TRVAo9W47y) [video]
 * [**JavaScript**: _Build Your Own Module Bundler - Minipack_](https://github.com/ronami/minipack)
 * [**JavaScript**: _Learn JavaScript Promises by Building a Promise from Scratch_](https://levelup.gitconnected.com/understand-javascript-promises-by-building-a-promise-from-scratch-84c0fd855720)