diff --git a/computers/commands.lua b/computers/commands.lua
new file mode 100644
index 0000000..cab340a
--- /dev/null
+++ b/computers/commands.lua
@@ -0,0 +1,16 @@
+computers.registered_commands = {}
+
+function computers.register_command(modpath)
+    local func = dofile(modpath .. "/init.lua")
+    local f = io.open(modpath .. "/conf.json")
+    local conf = minetest.parse_json(f:read("*all"))
+    f:close()
+    if func and computers.os.version >= conf.engine then computers.registered_commands[conf.name] = func end
+end
+
+--load default commands
+local dirs = minetest.get_dir_list(computers.modpath .. "/commands", true)
+
+for _, dir in pairs(dirs) do
+    computers.register_command(computers.modpath .. "/commands/" .. dir)
+end
\ No newline at end of file
diff --git a/computers/commands/echo/conf.json b/computers/commands/echo/conf.json
new file mode 100644
index 0000000..f7d1230
--- /dev/null
+++ b/computers/commands/echo/conf.json
@@ -0,0 +1,6 @@
+{
+    "name": "echo",
+    "license": "MIT",
+    "version": 0.1,
+    "engine": 0.3
+}
\ No newline at end of file
diff --git a/computers/commands/echo/init.lua b/computers/commands/echo/init.lua
new file mode 100644
index 0000000..bfbc32e
--- /dev/null
+++ b/computers/commands/echo/init.lua
@@ -0,0 +1,5 @@
+function echo(input)
+    return input
+end
+
+return echo
\ No newline at end of file
diff --git a/computers/commands/test/conf.json b/computers/commands/test/conf.json
new file mode 100644
index 0000000..f7bf272
--- /dev/null
+++ b/computers/commands/test/conf.json
@@ -0,0 +1,6 @@
+{
+    "name": "test",
+    "license": "MIT",
+    "version": 0.1,
+    "engine": 100000000
+}
\ No newline at end of file
diff --git a/computers/commands/test/init.lua b/computers/commands/test/init.lua
new file mode 100644
index 0000000..6ad0416
--- /dev/null
+++ b/computers/commands/test/init.lua
@@ -0,0 +1,6 @@
+function test()
+    --minetest.chat_send_all("test")
+    return 0
+end
+
+return test
\ No newline at end of file
diff --git a/computers/gui.lua b/computers/gui.lua
index fd82094..4134fc3 100644
--- a/computers/gui.lua
+++ b/computers/gui.lua
@@ -122,16 +122,32 @@ function computers.load_gui(pos, node, clicker)
                     border = false,
                 },
                 on_event = function(form, player, element, value)
-                    minetest.chat_send_all("value: " .. value)
                     local cindex = futil.get_index_by_name(form, "terminal_ctn")
                     local eindex = futil.get_index_by_name(form[cindex], "terminal_output")
                     local text = form[cindex][eindex].default
-                    form[cindex][eindex].default = text .. "user:~$ " .. value .. "\n"
+                    --form[cindex][eindex].default = text .. "user:~$ " .. value .. "\n"
 
                     if value == "clear" then
                         form[cindex][eindex].default = "user:~$\n"
                     end
 
+                    local cdata = value:split(" ", false, 1)
+
+                    if computers.registered_commands[cdata[1]] then
+                        form[cindex][eindex].default = text .. "user:~$ " .. cdata[1] .. "\n"
+                        text = form[cindex][eindex].default
+                        local output = computers.registered_commands[cdata[1]](cdata[2])
+                        if output and output ~= "" and type(output) == "string" then
+                            form[cindex][eindex].default = text .. output .. "\n"
+                        end
+                    elseif value == "clear" then
+                        form[cindex][eindex].default = "user:~$\n"
+                    elseif value == "" then
+                        form[cindex][eindex].default = text .. "user:~$\n"
+                    else
+                        form[cindex][eindex].default = text .. "user:~$ " .. value .. "\nERROR: command not found\n"
+                    end
+
                     return form
                 end,
             },
diff --git a/computers/init.lua b/computers/init.lua
index a8b2e74..29b072f 100644
--- a/computers/init.lua
+++ b/computers/init.lua
@@ -1,7 +1,16 @@
 computers = {}
 computers.modpath = minetest.get_modpath("computers")
 
+computers.os = {
+    version = 0.3,
+    name = "kuto",
+    authors = {"wsor", "luk3yx"},
+    license = "MIT",
+}
+
 dofile(computers.modpath .. "/old_stuff/init.lua")
+
 dofile(computers.modpath .. "/formspec.lua")
+dofile(computers.modpath .. "/commands.lua")
 dofile(computers.modpath .. "/gui.lua")
 dofile(computers.modpath .. "/demo.lua")