diff --git a/README.md b/README.md
index c00e536d6..aba048c95 100644
--- a/README.md
+++ b/README.md
@@ -335,7 +335,7 @@ Courses | Duration | Effort | Prerequisites
:-- | :--: | :--: | :--:
[Electricity and Magnetism, Part 1](https://www.edx.org/course/electricity-magnetism-part-1-ricex-phys102-1x-0)1 | 7 weeks | 8-10 hours/week | calculus, basic mechanics
[Electricity and Magnetism, Part 2](https://www.edx.org/course/electricity-magnetism-part-2-ricex-phys102-2x-0) | 7 weeks | 8-10 hours/week | Electricity and Magnetism, Part 1
-[Computation Structures 1: Digital Circuits](https://www.edx.org/course/computation-structures-part-1-digital-mitx-6-004-1x-0)2 | 10 weeks | 6 hours/week | electricity, magnetism
+[Computation Structures 1: Digital Circuits](https://www.edx.org/course/computation-structures-part-1-digital-mitx-6-004-1x-0) | 10 weeks | 6 hours/week | electricity, magnetism
[Computation Structures 2: Computer Architecture](https://www.edx.org/course/computation-structures-2-computer-mitx-6-004-2x) | 10 weeks | 6 hours/week | Computation Structures 1
[Computation Structures 3: Computer Organization](https://www.edx.org/course/computation-structures-3-computer-mitx-6-004-3x-0) | 10 weeks | 6 hours/week | Computation Structures 2
[ops-class.org - Hack the Kernel](https://www.ops-class.org/) | 15 weeks | 6 hours/week | algorithms
@@ -345,10 +345,6 @@ These courses assume knowledge of basic physics;
if you are struggling, you can find a physics MOOC or utilize the materials from Khan Academy:
[Khan Academy - Physics](https://www.khanacademy.org/science/physics)
-**2 Note**:
-A shorter, less intense (but still very advanced) alternative to Computation Structures is here:
-[Computer Architecture](https://www.coursera.org/learn/comparch)
-
### Advanced theory
**Topics covered**:
diff --git a/extras/courses.md b/extras/courses.md
index e1b52a8e6..fc0645fc3 100644
--- a/extras/courses.md
+++ b/extras/courses.md
@@ -31,6 +31,7 @@ Courses | Duration | Effort
Courses | Duration | Effort
:-- | :--: | :--:
+[Computer Architecture](https://www.coursera.org/learn/comparch) | - | 5-8 hours/week
[Operating System Engineering](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-828-operating-system-engineering-fall-2012/) | - | -
[Introduction to Operating Systems](https://www.udacity.com/course/introduction-to-operating-systems--ud923)| 8 weeks | 5-8 hours/week
[Advanced Operating Systems](https://www.udacity.com/course/advanced-operating-systems--ud189)| 5 weeks | 5-8 hours/week