X-Git-Url: https://sipb.mit.edu/gitweb.cgi/wiki.git/blobdiff_plain/0c0f5bbad2ffe467cda77f3b33d2c284b315b85d..5e5bf118ec8cf47d17c29717ad7f596a6d6aa75b:/doc/summer-reading.mdwn

diff --git a/doc/summer-reading.mdwn b/doc/summer-reading.mdwn
index 6e22e2d..8003039 100644
--- a/doc/summer-reading.mdwn
+++ b/doc/summer-reading.mdwn
@@ -18,6 +18,7 @@ Additions are quite welcome.
  * [How Athena Works](http://web.mit.edu/ghudson/info/athena), by Greg Hudson, longtime Athena engineer and SIPB member. Note that sections 5 through 11 don't really apply any more.
  * [The e-mail threading algorithm](http://www.jwz.org/doc/threading.html), by Jamie Zawinski (jwz), old Netscape hacker. Interesting not only for the algorithm per se, but for his description of the process leading to its development, and his [lost argument with Netscape 4's engineers](http://www.jwz.org/doc/mailsum.html) against replacing the algorithm with something overengineered
  * [HOWTO Encourage Women in Linux](http://valerieaurora.org/howto.html), by Valerie Aurora, a Linux kernel hacker.
+ * [The Unix Time-Sharing System](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.33.1204&rep=rep1&type=pdf), by Dennis Ritchie and Ken Thompson. From 1974, but still almost entirely accurate. Sections 3, 5, and 6 are particularly good
 
 ## Books online