diff --git a/pages/unix.md b/pages/unix.md
index 43c1b90..aabd596 100644
--- a/pages/unix.md
+++ b/pages/unix.md
@@ -1,6 +1,8 @@
 tags:: #linux #[[operating system]] #programming
 
+- prev: [[operating system]]
 - > unix is a family of [[multitasking]], multi-[[user]] of [[operating system]]s.
 	- from the #wikipedia article on unix: https://en.wikipedia.org/wiki/Unix
-- these operating systems were originally meant as a convenient platform for [[programmers]] to develop [[software]].
+- unix operating systems were originally meant as a convenient platform for [[programmers]] to develop [[software]].
+- unix was originally developed by Ken Thompson, Dennis Ritchie, and others at AT&T around 1969. #nice
 -
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