diff --git a/tech/graphics.wiki b/tech/graphics.wiki
index f999d9b..8fde3b4 100644
--- a/tech/graphics.wiki
+++ b/tech/graphics.wiki
@@ -6,6 +6,7 @@ Computer graphics is the field focusing on making a computer generate an image.
 
 * [[8_rules_ui]]
 * [[usability_heuristics]]
+* [[human_limitations]]
 
 == Colorspaces ==
 
diff --git a/tech/human_limitations.wiki b/tech/human_limitations.wiki
new file mode 100644
index 0000000..2a75a6a
--- /dev/null
+++ b/tech/human_limitations.wiki
@@ -0,0 +1,26 @@
+= Human limitations on UI =
+
+== role of humans in ui ==
+
+* sensory processing
+  * see/hear/etc
+* interpret data
+* actor upon feedback
+
+* involve user in the software (dont do everything for them)
+
+== perceptial limitation ==
+
+Sight
+
+* braille keyboards
+* speech software
+
+Hearing
+
+* Captions
+
+Mobility
+
+* Speech input
+* eye movements as "cursor"