# Meta Tables Meta tables allow you to add functions to all classes in the game at the same time. For example, adding a function to "Entity" meta table like so: ``` local meta = FindMetaTable( "Entity" ) function meta:ResetHealth() self:SetHealth( self:GetMaxHealth() ) end ``` Will allow you to use it on ALL entities like so: ``` local ply = Entity( 1 ) -- Gets the first player on the server ply:ResetHealth() -- We can call this function on any entity, including a player or an NPC. ``` However adding a function like this: ``` local ply = Entity( 1 ) function ply:ResetHealth() self:SetHealth( self:GetMaxHealth() ) end ``` Will not allow you to use that function on any other entity BUT <page>Global.Entity</page>( 1 ) A list of type meta tables that can be retrieved with <page>Global.FindMetaTable</page> can be found on <page>TYPE</page>. A list of type meta tables that can be retrieved with <page>Global.FindMetaTable</page> can be found on <page>Enums/TYPE</page>.