Town presentation for btc and etc transactions

好的Github readme.md

Github readme.md 美化

Cheatsheet for manythings

GPG cheaksheet

来自Pecco的算法学习笔记（目录）

labuladong 的算法小抄 整理自 Leetcode

Useful ACADEMIC tool books

All language tools in ILT

KU Leuven Terminology