diff --git a/index.wiki b/index.wiki
index 4b0138d..6e6dd60 100644
--- a/index.wiki
+++ b/index.wiki
@@ -27,6 +27,7 @@ _Ideas.md and Classes.md are encrypted, so these links will not work_
 * [[tech/android|Android]]
 * [[tech/Ham|Ham]] - Ham radio
 * [[tech/misc|Misc]] - Miscellaneous tools
+* [[tech/Web3|Web3]] - Web3 and decentralization
 
 == [[lang/index|Languages]] ==
 
diff --git a/tech/Ethereum.wiki b/tech/Ethereum.wiki
new file mode 100644
index 0000000..d6e25b1
--- /dev/null
+++ b/tech/Ethereum.wiki
@@ -0,0 +1 @@
+= Ethereum =
diff --git a/tech/Web3.wiki b/tech/Web3.wiki
new file mode 100644
index 0000000..1c91058
--- /dev/null
+++ b/tech/Web3.wiki
@@ -0,0 +1,8 @@
+= Web3 =
+
+Web3 is the idea of the new generation on the internet where programs are
+written in a decenteralized and trustless manner. 
+
+== Core techs ==
+
+* [[Ethereum]]