diff --git a/20200827210537-audio_fingerprinting.org b/20200827210537-audio_fingerprinting.org
index aa6d9a9..d16f631 100644
--- a/20200827210537-audio_fingerprinting.org
+++ b/20200827210537-audio_fingerprinting.org
@@ -1,5 +1,5 @@
 #+title: Audio fingerprinting
 
-Through analyzing the shape of an audio file it is possible to generate compact
+Through [[file:20210219114633-digital_audio_processing.org][analyzing the shape of an audio file]] it is possible to generate compact
 hashes which, by allowing for noise and distortion, remain sufficient to later
 identify the same sound with reasonable precision.
diff --git a/20210125120720-planned_parenthood.org b/20210125120720-planned_parenthood.org
new file mode 100644
index 0000000..d0625ea
--- /dev/null
+++ b/20210125120720-planned_parenthood.org
@@ -0,0 +1,3 @@
+ #+title: Planned Parenthood
+* Contact Information
+- Social worker :: 215 351 5561 (Leave voicmail with name and DOB)
diff --git a/20210218105212-posix.org b/20210218105212-posix.org
new file mode 100644
index 0000000..78a4b99
--- /dev/null
+++ b/20210218105212-posix.org
@@ -0,0 +1,5 @@
+#+title: POSIX
+
+The Portable Operating System Interface.
+
+- [[file:20210218105231-linux.org][Linux]] is /mostly/ POSIX-compliant (see [[file:20210218105257-linux_standard_base.org][Linux Standard Base]]).
diff --git a/20210218105231-linux.org b/20210218105231-linux.org
new file mode 100644
index 0000000..a086917
--- /dev/null
+++ b/20210218105231-linux.org
@@ -0,0 +1 @@
+#+title: Linux
diff --git a/20210218105257-linux_standard_base.org b/20210218105257-linux_standard_base.org
new file mode 100644
index 0000000..103dfc3
--- /dev/null
+++ b/20210218105257-linux_standard_base.org
@@ -0,0 +1 @@
+#+title: Linux Standard Base
diff --git a/20210218134000-how_i_work.org b/20210218134000-how_i_work.org
new file mode 100644
index 0000000..448c825
--- /dev/null
+++ b/20210218134000-how_i_work.org
@@ -0,0 +1,18 @@
+#+title: How I Work
+
+I work primarily within [[file:20200711111302-emacs.org][Emacs]], typically with a Chromium web browser and/or a
+terminal emulator alongside it, and Slack and/or other messaging apps on another
+screen.
+
+* Coding
+- Navigating projects and source files using Projectile.
+- Staging and committing changes with Magit.
+- Running integrated code formatters, linters, and test runners.
+* Writing
+- Maintaining a work journal with [[file:20200710214307-org_mode.org][Org Mode]], taking meeting notes and keeping a
+  record of how I accomplish non-coding work like troubleshooting issues.
+- Documenting things as I go in [[file:20200710141321-org_roam.org][Org-roam]] and exporting them to Confluence when
+  necessary.
+** Including shell commands, http calls, sql queries, and their results in my notes
+** Including graphs and diagrams
+** Publishing documents
diff --git a/20210219114633-digital_audio_processing.org b/20210219114633-digital_audio_processing.org
new file mode 100644
index 0000000..575bf3f
--- /dev/null
+++ b/20210219114633-digital_audio_processing.org
@@ -0,0 +1 @@
+#+title: Digital Audio Processing
diff --git a/20210219121222-rendering_an_animated_gif_in_pygame.org b/20210219121222-rendering_an_animated_gif_in_pygame.org
new file mode 100644
index 0000000..6f6ff5e
--- /dev/null
+++ b/20210219121222-rendering_an_animated_gif_in_pygame.org
@@ -0,0 +1,35 @@
+#+title: Rendering an animated GIF in pygame
+- [[file:20200723095845-software_development.org][Software Development]]
+
+#+begin_src python :results file :exports both
+  from PIL import Image
+  import pygame
+  import pygame.image
+
+
+  def create_images():
+      images = []
+      for i in range(6):
+          surface = pygame.Surface((256, 256))
+          surface.fill((255 - i * 50, 255, i * 50))
+          image = Image.frombytes(
+              "RGBA", (256, 256), pygame.image.tostring(surface, "RGBA", False)
+          )
+          images.append(image)
+      return images
+
+
+  images = create_images()
+  images[0].save(
+      "animated.gif",
+      format="GIF",
+      append_images=images[1:],
+      save_all=True,
+      duration=300,
+      loop=0,
+  )
+  return "animated.gif"
+#+end_src
+
+#+RESULTS:
+[[file:animated.gif]]