diff --git a/core/units.go b/core/units.go
new file mode 100644
index 0000000..6307dd1
--- /dev/null
+++ b/core/units.go
@@ -0,0 +1,28 @@
+package core
+
+import (
+	"encoding/json"
+
+	"github.com/localhots/yeast/impl"
+	"github.com/localhots/yeast/unit"
+)
+
+var (
+	Units = map[string]Caller{}
+)
+
+func LoadUnits(b []byte) {
+	var conf map[string]map[string]interface{}
+	json.Unmarshal(b, &conf)
+
+	for name, meta := range conf {
+		// Check for unit implementation and create a unit if there is none
+		if imp := impl.New(meta["impl"].(string)); imp != nil {
+			Units[name] = imp
+		} else {
+			Units[name] = &unit.Unit{
+				Name: name,
+			}
+		}
+	}
+}