diff --git a/ets.md b/ets.md
new file mode 100644
index 000000000..f388085a3
--- /dev/null
+++ b/ets.md
@@ -0,0 +1,38 @@
+---
+title: Erlang ETS
+category: Elixir
+---
+
+```elixir
+iex> table = :ets.new(:my_table)
+     8211
+
+iex> :ets.insert(table, {:fruit, "Apple"})
+iex> :ets.lookup(table, :fruit)
+     [{:fruit, "Apple"}]
+
+iex> :ets.delete(table)
+```
+
+### Flags
+
+```
+iex> table = :ets.new(:my_table, [:set, :protected])
+```
+
+- `:set` - no duplicate keys (or: `:ordered_set`, `:bag`, `:duplicate_bag`)
+- `:protected` - only this process can use it (or: `:public`, `:private`)
+
+### Other functions
+
+```elixir
+# Ordered sets
+:ets.first(table)
+:ets.last(table)
+:ets.next(table, key)
+:ets.prev(table, key)
+```
+
+## References
+
+* <http://erlang.org/doc/man/ets.html>
diff --git a/heroku.md b/heroku.md
index 0f37d00ac..70e1bc833 100644
--- a/heroku.md
+++ b/heroku.md
@@ -89,18 +89,6 @@ category: Devops
       heroku domains:clear
       heroku domains:remove example.com
 
-### DNS records
-
-    # Root domains
-    mydomain.com. (A)
-      => 75.101.163.44
-      => 75.101.145.87
-      => 174.129.212.2
-
-    # Subdomains
-    .mydomain.com. (CNAME)
-      => proxy.heroku.com
-
 ### Wildcard domains
 
     heroku addons:add wildcard_domains