From cb7339fc6b44292f86787cf1d1420b8458530f77 Mon Sep 17 00:00:00 2001
From: Harald Schilly <harald.schilly@gmail.com>
Date: Sun, 13 Oct 2013 10:44:55 +0200
Subject: [PATCH] adding two link for "Sage", the mathematical software system

---
 free-programming-books.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/free-programming-books.md b/free-programming-books.md
index 28ac34c7e..dbfd3b15a 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -59,6 +59,7 @@
 * [Ruby](#ruby)
 * [Ruby on Rails](#ruby-on-rails)
 * [Rust](#rust)
+* [Sage](#sage)
 * [Scala](#scala)
 * [Scheme](#scheme)
 * [Sed](#sed)
@@ -655,6 +656,10 @@
 
 * [Rust for Rubyists](http://www.rustforrubyists.com/book/index.html)
 
+###Sage
+
+* [The Sage Manuals](http://sagemath.org/doc/)
+* [Sage for Newbies](http://sage.math.washington.edu/home/tkosan/newbies_book/)
 
 ###Scala