diff --git a/CPX_DAC_Guide/adafruit_logo_vector.py b/CPX_DAC_Guide/adafruit_logo_vector.py
index 9bdcf3822..3ca9be4da 100644
--- a/CPX_DAC_Guide/adafruit_logo_vector.py
+++ b/CPX_DAC_Guide/adafruit_logo_vector.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2019 Anne Barela for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 ### Adafruit logo
 
 """Adafruit logo created from bitmap,
diff --git a/CPX_DAC_Guide/code.py b/CPX_DAC_Guide/code.py
index 359e3af19..8f3cc7363 100644
--- a/CPX_DAC_Guide/code.py
+++ b/CPX_DAC_Guide/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2019 Kevin J. Walters for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 ### scope-xy-adafruitlogo v1.0
 
 """Output a logo to an oscilloscope in X-Y mode on an Adafruit M4
diff --git a/CPX_DAC_Guide/python/pngtowav.py b/CPX_DAC_Guide/python/pngtowav.py
index ebcbe26c6..ebd593313 100644
--- a/CPX_DAC_Guide/python/pngtowav.py
+++ b/CPX_DAC_Guide/python/pngtowav.py
@@ -1,173 +1,177 @@
-#!/usr/bin/python3
-
-### pngtowav v1.0
-"""Convert a list of png images to pseudo composite video in wav file form.
-
-This is Python code not intended for running on a microcontroller board.
-"""
-
-### MIT License
-
-### Copyright (c) 2019 Kevin J. Walters
-
-### Permission is hereby granted, free of charge, to any person obtaining a copy
-### of this software and associated documentation files (the "Software"), to deal
-### in the Software without restriction, including without limitation the rights
-### to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-### copies of the Software, and to permit persons to whom the Software is
-### furnished to do so, subject to the following conditions:
-
-### The above copyright notice and this permission notice shall be included in all
-### copies or substantial portions of the Software.
-
-### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-### IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-### FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-### AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-### LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-### OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-### SOFTWARE.
-
-import getopt
-import sys
-import array
-import wave
-
-import imageio
-
-
-### globals
-### pylint: disable=invalid-name
-### start_offset of 1 can help if triggering on oscilloscope
-### is missing alternate lines
-debug = 0
-verbose = False
-movie_file = False
-output_filename = "dacanim.wav"
-fps = 50
-threshold = 128  ### pixel level
-replaceforsync = False
-start_offset = 1
-
-max_dac_v = 3.3
-### 16 bit wav files always use signed representation for data
-dac_offtop = 2**15-1  ### 3.30V
-dac_sync = -2**15     ### 0.00V
-### image from 3.00V to 0.30V
-dac_top = round(3.00 / max_dac_v * (2**16-1)) - 2**15
-dac_bottom = round(0.30 / max_dac_v * (2**16-1)) - 2**15
-
-
-def usage(exit_code):  ### pylint: disable=missing-docstring
-    print("pngtowav: "
-          + "[-d] [-f fps] [-h] [-m] [-o outputfilename] [-r] [-s lineoffset] [-t threshold] [-v]",
-          file=sys.stderr)
-    if exit_code is not None:
-        sys.exit(exit_code)
-
-
-def image_to_dac(img, row_offset, first_pix, dac_y_range):
-    """Convert a single image to DAC output."""
-    dac_out = array.array("h", [])
-
-    img_height, img_width = img.shape
-    if verbose:
-        print("W,H", img_width, img_height)
-
-    for row_o in range(img_height):
-        row = (row_o + row_offset) % img_height
-        ### Currently using 0 to (n-1)/n range
-        y_pos = round(dac_top - row / (img_height - 1) * dac_y_range)
-        if verbose:
-            print("Adding row", row, "at y_pos", y_pos)
-        dac_out.extend(array.array("h",
-                                   [dac_sync]
-                                   + [y_pos if x >= threshold else dac_offtop
-                                      for x in img[row, first_pix:]]))
-    return dac_out, img_width, img_height
-
-
-def write_wav(filename, data, framerate):
-    """Create one channel 16bit wav file."""
-    wav_file = wave.open(filename, "w")
-    nchannels = 1
-    sampwidth = 2
-    nframes = len(data)
-    comptype = "NONE"
-    compname = "not compressed"
-    if verbose:
-        print("Writing wav file", filename, "at rate", framerate,
-              "with", nframes, "samples")
-    wav_file.setparams((nchannels, sampwidth, framerate, nframes,
-                        comptype, compname))
-    wav_file.writeframes(data)
-    wav_file.close()
-
-
-def main(cmdlineargs):  ### pylint: disable=too-many-branches
-    """main(args)"""
-    global debug, fps, movie_file, output_filename, replaceforsync  ### pylint: disable=global-statement
-    global threshold, start_offset, verbose  ### pylint: disable=global-statement
-
-    try:
-        opts, args = getopt.getopt(cmdlineargs,
-                                   "f:hmo:rs:t:v", ["help", "output="])
-    except getopt.GetoptError as err:
-        print(err,
-              file=sys.stderr)
-        usage(2)
-    for opt, arg in opts:
-        if opt == "-d":  ### pylint counts these towards too-many-branches :(
-            debug = 1
-        elif opt == "-f":
-            fps = int(arg)
-        elif opt in ("-h", "--help"):
-            usage(0)
-        elif opt == "-m":
-            movie_file = True
-        elif opt in ("-o", "--output"):
-            output_filename = arg
-        elif opt == "-r":
-            replaceforsync = True
-        elif opt == "-s":
-            start_offset = int(arg)
-        elif opt == "-t":
-            threshold = int(arg)
-        elif opt == "-v":
-            verbose = True
-        else:
-            print("Internal error: unhandled option",
-                  file=sys.stderr)
-            sys.exit(3)
-
-    dac_samples = array.array("h", [])
-
-    ### Decide whether to replace first column with sync pulse
-    ### or add it as an additional column
-    first_pix = 1 if replaceforsync else 0
-
-    ### Read each frame, either
-    ### many single image filenames in args or
-    ### one or more video (animated gifs) (needs -m on command line)
-    dac_y_range = dac_top - dac_bottom
-    row_offset = 0
-    for arg in args:
-        if verbose:
-            print("PROCESSING", arg)
-        if movie_file:
-            images = imageio.mimread(arg)
-        else:
-            images = [imageio.imread(arg)]
-
-        for img in images:
-            img_output, width, height = image_to_dac(img, row_offset,
-                                                     first_pix, dac_y_range)
-            dac_samples.extend(img_output)
-            row_offset += start_offset
-
-    write_wav(output_filename, dac_samples,
-              (width + (1 - first_pix)) * height * fps)
-
-
-if __name__ == "__main__":
-    main(sys.argv[1:])
+# SPDX-FileCopyrightText: 2019 Kevin J. Walters for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+#!/usr/bin/python3
+
+### pngtowav v1.0
+"""Convert a list of png images to pseudo composite video in wav file form.
+
+This is Python code not intended for running on a microcontroller board.
+"""
+
+### MIT License
+
+### Copyright (c) 2019 Kevin J. Walters
+
+### Permission is hereby granted, free of charge, to any person obtaining a copy
+### of this software and associated documentation files (the "Software"), to deal
+### in the Software without restriction, including without limitation the rights
+### to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+### copies of the Software, and to permit persons to whom the Software is
+### furnished to do so, subject to the following conditions:
+
+### The above copyright notice and this permission notice shall be included in all
+### copies or substantial portions of the Software.
+
+### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+### IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+### FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+### AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+### LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+### OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+### SOFTWARE.
+
+import getopt
+import sys
+import array
+import wave
+
+import imageio
+
+
+### globals
+### pylint: disable=invalid-name
+### start_offset of 1 can help if triggering on oscilloscope
+### is missing alternate lines
+debug = 0
+verbose = False
+movie_file = False
+output_filename = "dacanim.wav"
+fps = 50
+threshold = 128  ### pixel level
+replaceforsync = False
+start_offset = 1
+
+max_dac_v = 3.3
+### 16 bit wav files always use signed representation for data
+dac_offtop = 2**15-1  ### 3.30V
+dac_sync = -2**15     ### 0.00V
+### image from 3.00V to 0.30V
+dac_top = round(3.00 / max_dac_v * (2**16-1)) - 2**15
+dac_bottom = round(0.30 / max_dac_v * (2**16-1)) - 2**15
+
+
+def usage(exit_code):  ### pylint: disable=missing-docstring
+    print("pngtowav: "
+          + "[-d] [-f fps] [-h] [-m] [-o outputfilename] [-r] [-s lineoffset] [-t threshold] [-v]",
+          file=sys.stderr)
+    if exit_code is not None:
+        sys.exit(exit_code)
+
+
+def image_to_dac(img, row_offset, first_pix, dac_y_range):
+    """Convert a single image to DAC output."""
+    dac_out = array.array("h", [])
+
+    img_height, img_width = img.shape
+    if verbose:
+        print("W,H", img_width, img_height)
+
+    for row_o in range(img_height):
+        row = (row_o + row_offset) % img_height
+        ### Currently using 0 to (n-1)/n range
+        y_pos = round(dac_top - row / (img_height - 1) * dac_y_range)
+        if verbose:
+            print("Adding row", row, "at y_pos", y_pos)
+        dac_out.extend(array.array("h",
+                                   [dac_sync]
+                                   + [y_pos if x >= threshold else dac_offtop
+                                      for x in img[row, first_pix:]]))
+    return dac_out, img_width, img_height
+
+
+def write_wav(filename, data, framerate):
+    """Create one channel 16bit wav file."""
+    wav_file = wave.open(filename, "w")
+    nchannels = 1
+    sampwidth = 2
+    nframes = len(data)
+    comptype = "NONE"
+    compname = "not compressed"
+    if verbose:
+        print("Writing wav file", filename, "at rate", framerate,
+              "with", nframes, "samples")
+    wav_file.setparams((nchannels, sampwidth, framerate, nframes,
+                        comptype, compname))
+    wav_file.writeframes(data)
+    wav_file.close()
+
+
+def main(cmdlineargs):  ### pylint: disable=too-many-branches
+    """main(args)"""
+    global debug, fps, movie_file, output_filename, replaceforsync  ### pylint: disable=global-statement
+    global threshold, start_offset, verbose  ### pylint: disable=global-statement
+
+    try:
+        opts, args = getopt.getopt(cmdlineargs,
+                                   "f:hmo:rs:t:v", ["help", "output="])
+    except getopt.GetoptError as err:
+        print(err,
+              file=sys.stderr)
+        usage(2)
+    for opt, arg in opts:
+        if opt == "-d":  ### pylint counts these towards too-many-branches :(
+            debug = 1
+        elif opt == "-f":
+            fps = int(arg)
+        elif opt in ("-h", "--help"):
+            usage(0)
+        elif opt == "-m":
+            movie_file = True
+        elif opt in ("-o", "--output"):
+            output_filename = arg
+        elif opt == "-r":
+            replaceforsync = True
+        elif opt == "-s":
+            start_offset = int(arg)
+        elif opt == "-t":
+            threshold = int(arg)
+        elif opt == "-v":
+            verbose = True
+        else:
+            print("Internal error: unhandled option",
+                  file=sys.stderr)
+            sys.exit(3)
+
+    dac_samples = array.array("h", [])
+
+    ### Decide whether to replace first column with sync pulse
+    ### or add it as an additional column
+    first_pix = 1 if replaceforsync else 0
+
+    ### Read each frame, either
+    ### many single image filenames in args or
+    ### one or more video (animated gifs) (needs -m on command line)
+    dac_y_range = dac_top - dac_bottom
+    row_offset = 0
+    for arg in args:
+        if verbose:
+            print("PROCESSING", arg)
+        if movie_file:
+            images = imageio.mimread(arg)
+        else:
+            images = [imageio.imread(arg)]
+
+        for img in images:
+            img_output, width, height = image_to_dac(img, row_offset,
+                                                     first_pix, dac_y_range)
+            dac_samples.extend(img_output)
+            row_offset += start_offset
+
+    write_wav(output_filename, dac_samples,
+              (width + (1 - first_pix)) * height * fps)
+
+
+if __name__ == "__main__":
+    main(sys.argv[1:])
diff --git a/CPX_DAC_Guide/python/svgtopy.py b/CPX_DAC_Guide/python/svgtopy.py
index 5370e2b88..43ef61fe3 100644
--- a/CPX_DAC_Guide/python/svgtopy.py
+++ b/CPX_DAC_Guide/python/svgtopy.py
@@ -1,134 +1,138 @@
-#!/usr/bin/python3
-
-### svgtopy v1.0
-"""Print vectors from an SVG input file in python list format
-for easy pasting into a program.
-
-This is Python code not intended for running on a microcontroller board.
-"""
-
-### MIT License
-
-### Copyright (c) 2019 Kevin J. Walters
-
-### Permission is hereby granted, free of charge, to any person obtaining a copy
-### of this software and associated documentation files (the "Software"), to deal
-### in the Software without restriction, including without limitation the rights
-### to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-### copies of the Software, and to permit persons to whom the Software is
-### furnished to do so, subject to the following conditions:
-
-### The above copyright notice and this permission notice shall be included in all
-### copies or substantial portions of the Software.
-
-### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-### IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-### FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-### AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-### LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-### OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-### SOFTWARE.
-
-
-### it only understands M and L in SVG
-
-### Worth looking at SVG libraries to see if they
-### can parse/transform SVG data
-
-import getopt
-import sys
-import re
-##import fileinput
-import xml.etree.ElementTree as ET
-
-### globals
-### pylint: disable=invalid-name
-debug = 0
-verbose = False
-
-
-def usage(exit_code):  ### pylint: disable=missing-docstring
-    print("""Usage: svgtopy [-d] [-h] [-v] [--help]
-Convert an svg file from from standard input to comma-separated tuples
-on standard output for inclusion as a list in a python program.""",
-          file=sys.stderr)
-    if exit_code is not None:
-        sys.exit(exit_code)
-
-
-def search_path_d(svgdata, point_groups):
-    """Look for M and L in the SVG d attribute of a path node"""
-
-    points = []
-    for match in re.finditer(r"([A-Za-z])([\d\.]+)\s+([\d\.]+)\s*", svgdata):
-        if match:
-            cmd = match.group(1)
-            if cmd == "M":  ### Start of a new part
-                mx, my = match.group(2, 3)
-                if points:
-                    point_groups.append(points)
-                    points = []
-                points.append((float(mx), float(my)))
-                if debug:
-                    print("M pos", mx, my)
-
-            elif cmd == "L":  ### Continuation of current part
-                lx, ly = match.group(2, 3)
-                points.append((float(lx), float(ly)))
-                if debug:
-                    print("L pos", lx, ly)
-
-            else:
-                print("SVG cmd not implemented:", cmd,
-                      file=sys.stderr)
-        else:
-            print("some parsing issue",
-                  file=sys.stderr)
-
-    # Add the last part to point_groups
-    if points:
-        point_groups.append(points)
-        points = []
-
-
-def main(cmdlineargs):
-    """main(args)"""
-    global debug, verbose  ### pylint: disable=global-statement
-
-    try:
-        opts, _ = getopt.getopt(cmdlineargs,
-                                "dhv", ["help"])
-    except getopt.GetoptError as err:
-        print(err,
-              file=sys.stderr)
-        usage(2)
-    for opt, _ in opts:
-        if opt == "-d":
-            debug = True
-        elif opt == "-v":
-            verbose = True
-        elif opt in ("-h", "--help"):
-            usage(0)
-        else:
-            print("Internal error: unhandled option",
-                  file=sys.stderr)
-            sys.exit(3)
-
-    xml_ns = {"svg": "http://www.w3.org/2000/svg"}
-    tree = ET.parse(sys.stdin)
-    point_groups = []
-    for path in tree.findall("svg:path", xml_ns):
-        svgdata = path.attrib["d"]
-        if verbose:
-            print("Processing path with {0:d} length".format(len(svgdata)))
-        search_path_d(svgdata, point_groups)
-
-
-
-    for idx, points in enumerate(point_groups):
-        print("# Group", idx + 1)
-        for point in points:
-            print("     ", point, ",", sep="")
-
-if __name__ == "__main__":
-    main(sys.argv[1:])
+# SPDX-FileCopyrightText: 2019 Kevin J. Walters for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+#!/usr/bin/python3
+
+### svgtopy v1.0
+"""Print vectors from an SVG input file in python list format
+for easy pasting into a program.
+
+This is Python code not intended for running on a microcontroller board.
+"""
+
+### MIT License
+
+### Copyright (c) 2019 Kevin J. Walters
+
+### Permission is hereby granted, free of charge, to any person obtaining a copy
+### of this software and associated documentation files (the "Software"), to deal
+### in the Software without restriction, including without limitation the rights
+### to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+### copies of the Software, and to permit persons to whom the Software is
+### furnished to do so, subject to the following conditions:
+
+### The above copyright notice and this permission notice shall be included in all
+### copies or substantial portions of the Software.
+
+### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+### IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+### FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+### AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+### LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+### OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+### SOFTWARE.
+
+
+### it only understands M and L in SVG
+
+### Worth looking at SVG libraries to see if they
+### can parse/transform SVG data
+
+import getopt
+import sys
+import re
+##import fileinput
+import xml.etree.ElementTree as ET
+
+### globals
+### pylint: disable=invalid-name
+debug = 0
+verbose = False
+
+
+def usage(exit_code):  ### pylint: disable=missing-docstring
+    print("""Usage: svgtopy [-d] [-h] [-v] [--help]
+Convert an svg file from from standard input to comma-separated tuples
+on standard output for inclusion as a list in a python program.""",
+          file=sys.stderr)
+    if exit_code is not None:
+        sys.exit(exit_code)
+
+
+def search_path_d(svgdata, point_groups):
+    """Look for M and L in the SVG d attribute of a path node"""
+
+    points = []
+    for match in re.finditer(r"([A-Za-z])([\d\.]+)\s+([\d\.]+)\s*", svgdata):
+        if match:
+            cmd = match.group(1)
+            if cmd == "M":  ### Start of a new part
+                mx, my = match.group(2, 3)
+                if points:
+                    point_groups.append(points)
+                    points = []
+                points.append((float(mx), float(my)))
+                if debug:
+                    print("M pos", mx, my)
+
+            elif cmd == "L":  ### Continuation of current part
+                lx, ly = match.group(2, 3)
+                points.append((float(lx), float(ly)))
+                if debug:
+                    print("L pos", lx, ly)
+
+            else:
+                print("SVG cmd not implemented:", cmd,
+                      file=sys.stderr)
+        else:
+            print("some parsing issue",
+                  file=sys.stderr)
+
+    # Add the last part to point_groups
+    if points:
+        point_groups.append(points)
+        points = []
+
+
+def main(cmdlineargs):
+    """main(args)"""
+    global debug, verbose  ### pylint: disable=global-statement
+
+    try:
+        opts, _ = getopt.getopt(cmdlineargs,
+                                "dhv", ["help"])
+    except getopt.GetoptError as err:
+        print(err,
+              file=sys.stderr)
+        usage(2)
+    for opt, _ in opts:
+        if opt == "-d":
+            debug = True
+        elif opt == "-v":
+            verbose = True
+        elif opt in ("-h", "--help"):
+            usage(0)
+        else:
+            print("Internal error: unhandled option",
+                  file=sys.stderr)
+            sys.exit(3)
+
+    xml_ns = {"svg": "http://www.w3.org/2000/svg"}
+    tree = ET.parse(sys.stdin)
+    point_groups = []
+    for path in tree.findall("svg:path", xml_ns):
+        svgdata = path.attrib["d"]
+        if verbose:
+            print("Processing path with {0:d} length".format(len(svgdata)))
+        search_path_d(svgdata, point_groups)
+
+
+
+    for idx, points in enumerate(point_groups):
+        print("# Group", idx + 1)
+        for point in points:
+            print("     ", point, ",", sep="")
+
+if __name__ == "__main__":
+    main(sys.argv[1:])
diff --git a/CircuitPython_KeyPad_Calculator/code/code.py b/CircuitPython_KeyPad_Calculator/code/code.py
index 7a63c680c..26c39de7b 100644
--- a/CircuitPython_KeyPad_Calculator/code/code.py
+++ b/CircuitPython_KeyPad_Calculator/code/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2021 Jeff Epler for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import board
 import displayio
 import keypad
diff --git a/Introducing_Gemma_M0/Gemma_AnalogIn/code.py b/Introducing_Gemma_M0/Gemma_AnalogIn/code.py
index f4059ba25..82ce63009 100644
--- a/Introducing_Gemma_M0/Gemma_AnalogIn/code.py
+++ b/Introducing_Gemma_M0/Gemma_AnalogIn/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # Gemma IO demo - analog inputs
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_AnalogOut/code.py b/Introducing_Gemma_M0/Gemma_AnalogOut/code.py
index 85f307a63..afa9bb2fc 100644
--- a/Introducing_Gemma_M0/Gemma_AnalogOut/code.py
+++ b/Introducing_Gemma_M0/Gemma_AnalogOut/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # CircuitPython IO demo - analog output
 
 import board
diff --git a/Introducing_Gemma_M0/Gemma_CapTouch/code.py b/Introducing_Gemma_M0/Gemma_CapTouch/code.py
index 98c9dc8b3..5376bde5e 100644
--- a/Introducing_Gemma_M0/Gemma_CapTouch/code.py
+++ b/Introducing_Gemma_M0/Gemma_CapTouch/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # Gemma IO demo - captouch
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_DigitalIO/code.py b/Introducing_Gemma_M0/Gemma_DigitalIO/code.py
index 5eefbb63c..664c56754 100644
--- a/Introducing_Gemma_M0/Gemma_DigitalIO/code.py
+++ b/Introducing_Gemma_M0/Gemma_DigitalIO/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # CircuitPython IO demo #1 - General Purpose I/O
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_DotStar/code.py b/Introducing_Gemma_M0/Gemma_DotStar/code.py
index 69d463c3a..3c39bbfb3 100644
--- a/Introducing_Gemma_M0/Gemma_DotStar/code.py
+++ b/Introducing_Gemma_M0/Gemma_DotStar/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # CircuitPython demo - Dotstar
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_HIDkeyboard/code.py b/Introducing_Gemma_M0/Gemma_HIDkeyboard/code.py
index f03064c25..16bcce4a2 100644
--- a/Introducing_Gemma_M0/Gemma_HIDkeyboard/code.py
+++ b/Introducing_Gemma_M0/Gemma_HIDkeyboard/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # CircuitPlayground demo - Keyboard emu
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_I2CScan/code.py b/Introducing_Gemma_M0/Gemma_I2CScan/code.py
index 63b65375e..f49e9f028 100644
--- a/Introducing_Gemma_M0/Gemma_I2CScan/code.py
+++ b/Introducing_Gemma_M0/Gemma_I2CScan/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # Gemma/Trinket IO demo - I2C scan
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_I2Csi7021/code.py b/Introducing_Gemma_M0/Gemma_I2Csi7021/code.py
index ff4e7121a..1f708c547 100644
--- a/Introducing_Gemma_M0/Gemma_I2Csi7021/code.py
+++ b/Introducing_Gemma_M0/Gemma_I2Csi7021/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # I2C sensor demo
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_Logger/code.py b/Introducing_Gemma_M0/Gemma_Logger/code.py
index fe43400d7..7c50f241d 100644
--- a/Introducing_Gemma_M0/Gemma_Logger/code.py
+++ b/Introducing_Gemma_M0/Gemma_Logger/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 
 import board
diff --git a/Introducing_Gemma_M0/Gemma_Logger_boot/code.py b/Introducing_Gemma_M0/Gemma_Logger_boot/code.py
index 10d73a6e7..f21a6e571 100644
--- a/Introducing_Gemma_M0/Gemma_Logger_boot/code.py
+++ b/Introducing_Gemma_M0/Gemma_Logger_boot/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import board
 import digitalio
 import storage
diff --git a/Introducing_Gemma_M0/Gemma_NeoPixel/code.py b/Introducing_Gemma_M0/Gemma_NeoPixel/code.py
index a6cf48ba8..b1170c7d4 100644
--- a/Introducing_Gemma_M0/Gemma_NeoPixel/code.py
+++ b/Introducing_Gemma_M0/Gemma_NeoPixel/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # CircuitPython demo - NeoPixel
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_Touch_DotStar/code.py b/Introducing_Gemma_M0/Gemma_Touch_DotStar/code.py
index 070099581..54ba3bc80 100644
--- a/Introducing_Gemma_M0/Gemma_Touch_DotStar/code.py
+++ b/Introducing_Gemma_M0/Gemma_Touch_DotStar/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # Gemma IO demo - captouch to dotstar
 
 import time
diff --git a/Introducing_Gemma_M0/Gemma_UART/code.py b/Introducing_Gemma_M0/Gemma_UART/code.py
index 64be6153a..c6af683ca 100644
--- a/Introducing_Gemma_M0/Gemma_UART/code.py
+++ b/Introducing_Gemma_M0/Gemma_UART/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 # Gemma IO demo - USB/Serial echo
 
 import busio
diff --git a/Introducing_Gemma_M0/dht22/code.py b/Introducing_Gemma_M0/dht22/code.py
index d25b585d7..7b34ef652 100644
--- a/Introducing_Gemma_M0/dht22/code.py
+++ b/Introducing_Gemma_M0/dht22/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 
 import adafruit_dht
diff --git a/Introducing_Gemma_M0/piezo_manual/code.py b/Introducing_Gemma_M0/piezo_manual/code.py
index 1aa905871..ae1963bb9 100644
--- a/Introducing_Gemma_M0/piezo_manual/code.py
+++ b/Introducing_Gemma_M0/piezo_manual/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 
 import board
diff --git a/Introducing_Gemma_M0/piezo_simpleio/code.py b/Introducing_Gemma_M0/piezo_simpleio/code.py
index b09657d2e..d3aede9e2 100644
--- a/Introducing_Gemma_M0/piezo_simpleio/code.py
+++ b/Introducing_Gemma_M0/piezo_simpleio/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 
 import board
diff --git a/Introducing_Gemma_M0/servosweep/code.py b/Introducing_Gemma_M0/servosweep/code.py
index 7f9a5c1cd..1b7496f6f 100644
--- a/Introducing_Gemma_M0/servosweep/code.py
+++ b/Introducing_Gemma_M0/servosweep/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 
 import board
diff --git a/IoT_NeoPixel_Sign/code.py b/IoT_NeoPixel_Sign/code.py
index c9f8a3034..3c0130464 100644
--- a/IoT_NeoPixel_Sign/code.py
+++ b/IoT_NeoPixel_Sign/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2020 Noe Ruiz for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import ssl
 import board
 import neopixel
diff --git a/LED_Trampoline/code.py b/LED_Trampoline/code.py
index cf78455ea..5b5d28c87 100644
--- a/LED_Trampoline/code.py
+++ b/LED_Trampoline/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import random
 import time
 
diff --git a/Make_It_Twist_Potentiometer/potentiometer-neopixels/code.py b/Make_It_Twist_Potentiometer/potentiometer-neopixels/code.py
index 22ac840b9..8dbf7d05d 100644
--- a/Make_It_Twist_Potentiometer/potentiometer-neopixels/code.py
+++ b/Make_It_Twist_Potentiometer/potentiometer-neopixels/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2018 Anne Barela for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 import board
 from analogio import AnalogIn
diff --git a/Make_It_Twist_Potentiometer/potentiometer-neopixels/potentiometer-neopixels.ino b/Make_It_Twist_Potentiometer/potentiometer-neopixels/potentiometer-neopixels.ino
index f92e7a1e3..cf219baf0 100644
--- a/Make_It_Twist_Potentiometer/potentiometer-neopixels/potentiometer-neopixels.ino
+++ b/Make_It_Twist_Potentiometer/potentiometer-neopixels/potentiometer-neopixels.ino
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2018 Anne Barela for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
 // Read analog potentiometer on Circuit Playground Express or other board with changes
 // Anne Barela for Adafruit Industries 9/2018 based on
 // NeoPixel Ring simple sketch (c) 2013 Shae Erisson
diff --git a/Make_It_Twist_Potentiometer/potentiometer-print/code.py b/Make_It_Twist_Potentiometer/potentiometer-print/code.py
index 3f72dd292..6cfc01c7d 100644
--- a/Make_It_Twist_Potentiometer/potentiometer-print/code.py
+++ b/Make_It_Twist_Potentiometer/potentiometer-print/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2018 Anne Barela for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 import board
 from analogio import AnalogIn
diff --git a/NeoPixel_Tiara/NeoPixel_Tiara.ino b/NeoPixel_Tiara/NeoPixel_Tiara.ino
index 8f8300345..12c68d419 100644
--- a/NeoPixel_Tiara/NeoPixel_Tiara.ino
+++ b/NeoPixel_Tiara/NeoPixel_Tiara.ino
@@ -1,3 +1,8 @@
+// SPDX-FileCopyrightText: 2017 Dano Wall for Adafruit Industries
+// SPDX-FileCopyrightText: 2017 Becky Stern for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
 //Random Flash animation for Neopixel circuits
 //by Dano Wall and Becky Stern for Adafruit Industries
 //based on the Sparkle Skirt, minus the accelerometer
diff --git a/PyBadge_Blinka_Jump_Game/code.py b/PyBadge_Blinka_Jump_Game/code.py
index c0b68a8a0..5d18b67df 100644
--- a/PyBadge_Blinka_Jump_Game/code.py
+++ b/PyBadge_Blinka_Jump_Game/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2020 Liz Clark for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import time
 from random import randint
 from micropython import const
diff --git a/Sunflower_Mobile/code.py b/Sunflower_Mobile/code.py
index fa815fcfb..7dd2cbbd2 100644
--- a/Sunflower_Mobile/code.py
+++ b/Sunflower_Mobile/code.py
@@ -1,3 +1,8 @@
+# SPDX-FileCopyrightText: 2021 Erin St Blaine for Adafruit Industries
+# SPDX-FileCopyrightText: 2021 Dan Halbert for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 """
 LED Sunflower Mobile with Circuit Playground Bluefruit
 Full tutorial: