diff --git a/__init__.py b/__init__.py
index e69de29..9a04545 100644
--- a/__init__.py
+++ b/__init__.py
@@ -0,0 +1,2 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
diff --git a/petridish/__init__.py b/petridish/__init__.py
index e69de29..9a04545 100644
--- a/petridish/__init__.py
+++ b/petridish/__init__.py
@@ -0,0 +1,2 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
diff --git a/petridish/analysis/model.py b/petridish/analysis/model.py
index e1a3c0f..36bf581 100644
--- a/petridish/analysis/model.py
+++ b/petridish/analysis/model.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 """
 This script is gathers information about a model training run using
 the log file of the run (or the saved stdout of the run).
diff --git a/petridish/analysis/model_philly.py b/petridish/analysis/model_philly.py
index 7e5a4e9..390da1c 100644
--- a/petridish/analysis/model_philly.py
+++ b/petridish/analysis/model_philly.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import argparse
 import os, sys, re
 import numpy as np
diff --git a/petridish/analysis/model_util.py b/petridish/analysis/model_util.py
index 337d4b9..ef3516c 100644
--- a/petridish/analysis/model_util.py
+++ b/petridish/analysis/model_util.py
@@ -1,3 +1,5 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
 
 import re
 import sys
diff --git a/petridish/analysis/philly_util.py b/petridish/analysis/philly_util.py
index c9830fc..7d3605b 100644
--- a/petridish/analysis/philly_util.py
+++ b/petridish/analysis/philly_util.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 """
 This util handles special file system structures related to philly.
 """
diff --git a/petridish/analysis/search.py b/petridish/analysis/search.py
index b070c00..3e58d02 100644
--- a/petridish/analysis/search.py
+++ b/petridish/analysis/search.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 """
 This script inspects a log.log file of a search in order
 to extract the model architecture files for final training.
diff --git a/petridish/analysis/search_philly.py b/petridish/analysis/search_philly.py
index 4776aa6..33de4ea 100644
--- a/petridish/analysis/search_philly.py
+++ b/petridish/analysis/search_philly.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 """
 This script inspects a log.log file of a search in order
 to extract the model architecture files for final training.
diff --git a/petridish/analysis/search_util.py b/petridish/analysis/search_util.py
index 96eccbc..220cccc 100644
--- a/petridish/analysis/search_util.py
+++ b/petridish/analysis/search_util.py
@@ -1,4 +1,5 @@
-
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
 
 import numpy as np
 import json
diff --git a/petridish/app/__init__.py b/petridish/app/__init__.py
index 0fce5cf..3c4116d 100644
--- a/petridish/app/__init__.py
+++ b/petridish/app/__init__.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 # This module contains the python script entries of the petridish.
 # 1. the server handles search logics such as which to expand,
 # and which to train and evaluate. The critic for evaluating models
diff --git a/petridish/app/directory.py b/petridish/app/directory.py
index f69080d..032743e 100644
--- a/petridish/app/directory.py
+++ b/petridish/app/directory.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import os
 import glob
 import re
diff --git a/petridish/app/local_crawler.py b/petridish/app/local_crawler.py
index d9df7f6..2c3534c 100644
--- a/petridish/app/local_crawler.py
+++ b/petridish/app/local_crawler.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import os
 import re
 import subprocess
diff --git a/petridish/app/multi_proc.py b/petridish/app/multi_proc.py
index 12c3c85..ef808d3 100644
--- a/petridish/app/multi_proc.py
+++ b/petridish/app/multi_proc.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import zmq
 import sys, os
 import time
diff --git a/petridish/app/options.py b/petridish/app/options.py
index 590e28d..1fbf589 100644
--- a/petridish/app/options.py
+++ b/petridish/app/options.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import argparse
 import numpy as np
 import os
diff --git a/petridish/app/petridish_main.py b/petridish/app/petridish_main.py
index 9af324c..d41d7b5 100644
--- a/petridish/app/petridish_main.py
+++ b/petridish/app/petridish_main.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 """
 The actors:
         Server, Sleeper, Remote, Crawler.
diff --git a/petridish/cust_exps_gen/__init__.py b/petridish/cust_exps_gen/__init__.py
index e69de29..9a04545 100644
--- a/petridish/cust_exps_gen/__init__.py
+++ b/petridish/cust_exps_gen/__init__.py
@@ -0,0 +1,2 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
diff --git a/petridish/cust_exps_gen/generate_train_script.py b/petridish/cust_exps_gen/generate_train_script.py
index 94d0009..f8da7a6 100644
--- a/petridish/cust_exps_gen/generate_train_script.py
+++ b/petridish/cust_exps_gen/generate_train_script.py
@@ -1,3 +1,7 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+
 """
 This script generate a training script given
 a net_info stored in a single line in a text file,
diff --git a/petridish/cust_exps_gen/util.py b/petridish/cust_exps_gen/util.py
index 3a90e00..8d03fcd 100644
--- a/petridish/cust_exps_gen/util.py
+++ b/petridish/cust_exps_gen/util.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import argparse
 import itertools
 import copy
diff --git a/petridish/data/__init__.py b/petridish/data/__init__.py
index e69de29..9a04545 100644
--- a/petridish/data/__init__.py
+++ b/petridish/data/__init__.py
@@ -0,0 +1,2 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
diff --git a/petridish/data/cifar.py b/petridish/data/cifar.py
index 1ae0e10..00f8262 100644
--- a/petridish/data/cifar.py
+++ b/petridish/data/cifar.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import multiprocessing
 
diff --git a/petridish/data/downsampled_imagenet.py b/petridish/data/downsampled_imagenet.py
index a88eb75..5d1dfc2 100644
--- a/petridish/data/downsampled_imagenet.py
+++ b/petridish/data/downsampled_imagenet.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import os
 import re
diff --git a/petridish/data/imagenet.py b/petridish/data/imagenet.py
index d0a7925..ddb5099 100644
--- a/petridish/data/imagenet.py
+++ b/petridish/data/imagenet.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import os
 import cv2
diff --git a/petridish/data/inat.py b/petridish/data/inat.py
index e752c86..3213556 100644
--- a/petridish/data/inat.py
+++ b/petridish/data/inat.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import os
 import cv2
diff --git a/petridish/data/misc.py b/petridish/data/misc.py
index ebc14f4..7d03000 100644
--- a/petridish/data/misc.py
+++ b/petridish/data/misc.py
@@ -1,3 +1,5 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
 
 import numpy as np
 import scipy.io.arff as arff
diff --git a/petridish/data/openml.py b/petridish/data/openml.py
index 302af7a..278fc15 100644
--- a/petridish/data/openml.py
+++ b/petridish/data/openml.py
@@ -1,3 +1,5 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
 
 import numpy as np
 import scipy.io.arff as arff
diff --git a/petridish/data/ptb/__init__.py b/petridish/data/ptb/__init__.py
index d789f52..cfe4016 100644
--- a/petridish/data/ptb/__init__.py
+++ b/petridish/data/ptb/__init__.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 from petridish.data.ptb.ptb_tf import (
     _read_words, _build_vocab, _file_to_word_ids
 )
diff --git a/petridish/data/ptb/ptb.py b/petridish/data/ptb/ptb.py
index d77d89c..483ed35 100644
--- a/petridish/data/ptb/ptb.py
+++ b/petridish/data/ptb/ptb.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import os
 from tensorpack.dataflow import DataFlow
diff --git a/petridish/data/ptb/ptb_train_eval_helper.py b/petridish/data/ptb/ptb_train_eval_helper.py
index cbddf8c..b0dd4ea 100644
--- a/petridish/data/ptb/ptb_train_eval_helper.py
+++ b/petridish/data/ptb/ptb_train_eval_helper.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 from petridish.data.ptb import PennTreeBankDataFlow
 from petridish.utils.callbacks import (PerStepHookWithControlDependencies,
diff --git a/petridish/data/speech_commands.py b/petridish/data/speech_commands.py
index 0bef704..a62cf2e 100644
--- a/petridish/data/speech_commands.py
+++ b/petridish/data/speech_commands.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import os
 import re
diff --git a/petridish/data/tiny_imagenet.py b/petridish/data/tiny_imagenet.py
index 0aed45f..3a85292 100644
--- a/petridish/data/tiny_imagenet.py
+++ b/petridish/data/tiny_imagenet.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import os
 import cv2
diff --git a/petridish/info/__init__.py b/petridish/info/__init__.py
index 0d0f6e7..102aaf7 100644
--- a/petridish/info/__init__.py
+++ b/petridish/info/__init__.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 # This file contains everything that is
 from petridish.info.layer_info import LayerInfo, LayerTypes, LayerInfoList
 from petridish.info.net_info import (
diff --git a/petridish/info/layer_info.py b/petridish/info/layer_info.py
index 811404c..524276e 100644
--- a/petridish/info/layer_info.py
+++ b/petridish/info/layer_info.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import json
 import copy
diff --git a/petridish/info/net_info.py b/petridish/info/net_info.py
index 261e539..d86eb99 100644
--- a/petridish/info/net_info.py
+++ b/petridish/info/net_info.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import json
 import copy
diff --git a/petridish/model/__init__.py b/petridish/model/__init__.py
index 721a23e..fc5c35c 100644
--- a/petridish/model/__init__.py
+++ b/petridish/model/__init__.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 from petridish.model.feedforward import (
     PetridishBaseCell, PetridishModel, RecognitionModel, MLPModel
 )
diff --git a/petridish/model/common.py b/petridish/model/common.py
index a424457..4b68957 100644
--- a/petridish/model/common.py
+++ b/petridish/model/common.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import tensorflow as tf
 
diff --git a/petridish/model/droppath.py b/petridish/model/droppath.py
index 6995d19..97cc692 100644
--- a/petridish/model/droppath.py
+++ b/petridish/model/droppath.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import tensorflow as tf
 from tensorpack.tfutils.tower import get_current_tower_context
 from tensorpack.tfutils.common import get_global_step_var
diff --git a/petridish/model/feedforward.py b/petridish/model/feedforward.py
index 181e9d9..c483930 100644
--- a/petridish/model/feedforward.py
+++ b/petridish/model/feedforward.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import tensorflow as tf
 
diff --git a/petridish/model/hallu.py b/petridish/model/hallu.py
index 155d3b7..3cb9104 100644
--- a/petridish/model/hallu.py
+++ b/petridish/model/hallu.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import tensorflow as tf
 from petridish.info import LayerInfoList
 
diff --git a/petridish/model/layer.py b/petridish/model/layer.py
index b09d359..8ff4fce 100644
--- a/petridish/model/layer.py
+++ b/petridish/model/layer.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import tensorflow as tf
 import re
diff --git a/petridish/model/recurrrent.py b/petridish/model/recurrrent.py
index 4e2de12..e785030 100644
--- a/petridish/model/recurrrent.py
+++ b/petridish/model/recurrrent.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import tensorflow as tf
 
diff --git a/petridish/model/train_eval.py b/petridish/model/train_eval.py
index f859052..99e941b 100644
--- a/petridish/model/train_eval.py
+++ b/petridish/model/train_eval.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import tensorflow as tf
 import os
diff --git a/petridish/nas_control/__init__.py b/petridish/nas_control/__init__.py
index 38d8864..e74f66a 100644
--- a/petridish/nas_control/__init__.py
+++ b/petridish/nas_control/__init__.py
@@ -1,4 +1,7 @@
-# This module contains logics of NAS, which includes
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+# This module contains logic of NAS, which includes
 # 1. the choice of parent models to expand
 # 2. the choice of children/hallu models to train.
 # There were plan to make critics to learn to select them
diff --git a/petridish/nas_control/controller.py b/petridish/nas_control/controller.py
index 557252b..8a866db 100644
--- a/petridish/nas_control/controller.py
+++ b/petridish/nas_control/controller.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 """
 Controller holds constants regarding how the exploration/exploitation is done.
 It also contains the logics of these actions.
diff --git a/petridish/nas_control/critic.py b/petridish/nas_control/critic.py
index cb6260e..5331d14 100644
--- a/petridish/nas_control/critic.py
+++ b/petridish/nas_control/critic.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import os, re
 import numpy as np
 import tensorflow as tf
diff --git a/petridish/nas_control/queue.py b/petridish/nas_control/queue.py
index c8c0d36..74f3294 100644
--- a/petridish/nas_control/queue.py
+++ b/petridish/nas_control/queue.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 from collections import namedtuple
 import heapq
 import random
diff --git a/petridish/nas_control/queue_diversity.py b/petridish/nas_control/queue_diversity.py
index 5792d83..59211b3 100644
--- a/petridish/nas_control/queue_diversity.py
+++ b/petridish/nas_control/queue_diversity.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import heapq
 
diff --git a/petridish/philly/__init__.py b/petridish/philly/__init__.py
index e69de29..9a04545 100644
--- a/petridish/philly/__init__.py
+++ b/petridish/philly/__init__.py
@@ -0,0 +1,2 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
diff --git a/petridish/philly/container.py b/petridish/philly/container.py
index 79be364..5ec0fb4 100644
--- a/petridish/philly/container.py
+++ b/petridish/philly/container.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import os
 import json
 
diff --git a/petridish/philly/generator.py b/petridish/philly/generator.py
index d5c868d..0f5f563 100644
--- a/petridish/philly/generator.py
+++ b/petridish/philly/generator.py
@@ -1,7 +1,9 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import subprocess
 import json
 
-
 SCRIPT_TEMPLATE = \
 r"""#!/bin/bash
 
diff --git a/petridish/philly/heartbeat.py b/petridish/philly/heartbeat.py
index 58105e9..1fe5467 100644
--- a/petridish/philly/heartbeat.py
+++ b/petridish/philly/heartbeat.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import time
 from threading import Timer
 
diff --git a/petridish/utils/__init__.py b/petridish/utils/__init__.py
index e69de29..0eca642 100644
--- a/petridish/utils/__init__.py
+++ b/petridish/utils/__init__.py
@@ -0,0 +1,2 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
\ No newline at end of file
diff --git a/petridish/utils/callbacks.py b/petridish/utils/callbacks.py
index bf2b8ab..c41da38 100644
--- a/petridish/utils/callbacks.py
+++ b/petridish/utils/callbacks.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import tensorflow as tf
 
 from tensorpack.callbacks import Callback, HookToCallback, Inferencer
diff --git a/petridish/utils/geometry.py b/petridish/utils/geometry.py
index d0981d5..b3d8ecc 100644
--- a/petridish/utils/geometry.py
+++ b/petridish/utils/geometry.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import numpy as np
 import os
 import bisect
diff --git a/petridish/utils/sample.py b/petridish/utils/sample.py
index c4f2096..35ffcc0 100644
--- a/petridish/utils/sample.py
+++ b/petridish/utils/sample.py
@@ -1,3 +1,7 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+
 import numpy as np
 
 def online_sampling(x_gen, k):
diff --git a/petridish/utils/sessinit.py b/petridish/utils/sessinit.py
index 5aab8af..016ddac 100644
--- a/petridish/utils/sessinit.py
+++ b/petridish/utils/sessinit.py
@@ -1,3 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
 import os
 import numpy as np
 import tensorflow as tf