diff --git a/README.md b/README.md
index 369ccdd..85fdc79 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,11 @@
 Knowledge I have found interesting about the topic of x86 assembly
 ## x86 Registers
 ![x86 assembly Registers](x86-registers.png)
+
+In **x86 registers** have an '**e**' in front of their name.</br>
+Example: **e**ax, **e**bx, **e**cx, **e**dx, **e**bp
+
+*Additional Info: </br>
+In **x64** you have a '**r**' instead.</br>
+Example: **r**ax, **r**bx, **r**cx, **r**dx, **r**bp</br>
+You also have **double-precision floating point going from xmm0 to xmm15**.*