diff --git a/include/glow/Backends/BackendUtils.h b/include/glow/Backends/BackendUtils.h
index 20ff23eef9..5f984093c9 100644
--- a/include/glow/Backends/BackendUtils.h
+++ b/include/glow/Backends/BackendUtils.h
@@ -30,6 +30,10 @@ struct RuntimeSymbolInfo {
   size_t offset;
   /// Type of symbol.
   Type type;
+  /// Is the symbol an input for the function.
+  bool input;
+  /// Is the symbol an output for the function.
+  bool output;
 };
 
 /// Contains the information needed to be passed forward from compile time to
diff --git a/include/glow/Runtime/RuntimeTypes.h b/include/glow/Runtime/RuntimeTypes.h
new file mode 100644
index 0000000000..e4a8a7dd03
--- /dev/null
+++ b/include/glow/Runtime/RuntimeTypes.h
@@ -0,0 +1,67 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef GLOW_RUNTIME_RUNTIMETYPES_H
+#define GLOW_RUNTIME_RUNTIMETYPES_H
+
+#include "glow/Backends/BackendUtils.h"
+#include "glow/Graph/Graph.h"
+
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+namespace glow {
+namespace runtime {
+
+using NetworkIDty = size_t;
+using DeviceIDty = size_t;
+
+/// Enum to communicate results when communicating with device at initialization
+/// and runtime.
+enum ResultCode { READY, EXECUTED, FAILED, CANCELLED };
+
+/// Data structure that contains device constraint information for each device.
+/// Used to communicate memory constraints and later costs to the Partitioner.
+struct DeviceInfo {
+  /// Available memory on device in bytes.
+  uint64_t availableMemory;
+};
+
+/// Individual Node in the DAG for a given network. This contains all the
+/// information needed to run the sub-network at inference time.
+struct DAGNode {
+  /// The children of this node, these are nodes that depend on the current
+  /// node.
+  std::vector<DAGNode> children;
+  /// Pointers to the parents of this node. This is used by the executor for
+  /// determining if a given node has all dependencies met.
+  std::vector<DAGNode *> parents;
+  /// ID of the deviceManager that this network is assigned to.
+  DeviceIDty deviceID;
+  /// The logicalDevice is an output of the Partitioner to indicate that two
+  /// networks should be assigned to the same device.
+  DeviceIDty logicalDevice;
+  /// Name assigned to the sub-network, this is the id that will be passed to
+  /// the DeviceManager when requesting a run of the network.
+  std::string name;
+  /// Runtime bundle containing all the symbol information for this network at
+  /// runtime.
+  RuntimeBundle runtimeBundle;
+};
+
+} // namespace runtime
+} // namespace glow
+#endif // GLOW_RUNTIME_RUNTIMETYPES_H