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 # The Patterns of Scalable, Reliable, and Performant Large-Scale Systems
 
-An organized reading list for illustrating the patterns of scalable, reliable, and performant large-scale systems. Concepts are explained in the articles of prominent engineers and credible references. Case studies are taken from battle-tested systems that serve millions to billions of users.
+An updated and organized reading list for illustrating the patterns of scalable, reliable, and performant large-scale systems. Concepts are explained in the articles of prominent engineers and credible references. Case studies are taken from battle-tested systems that serve millions to billions of users.
 
 #### If your system goes slow :traffic_light:
 > Understand your problems: scalability problem (fast for a single user but slow under heavy load) or performance problem (slow for a single user) by reviewing some [design principles](#principle) and checking how [scalability](#scalability) and [performance](#performance) problems are solved at tech companies. The section of [intelligence](#intelligence) are created for those who work with data and machine learning at big (data) and deep (learning) scale.
@@ -761,7 +761,6 @@ An organized reading list for illustrating the patterns of scalable, reliable, a
 	* [How to do Distributed Locking](https://martin.kleppmann.com/2016/02/08/how-to-do-distributed-locking.html)
 	* [SQL Transaction Isolation Levels Explained](http://elliot.land/post/sql-transaction-isolation-levels-explained)
 * ["What Happens When... and How" Questions](https://www.glassdoor.com/Interview/What-happens-when-you-type-www-google-com-in-your-browser-QTN_56396.htm)
-	* [What Happens When You Type google.com into Browser and Press Enter?](https://github.com/alex/what-happens-when)
 	* [Netflix: What Happens When You Press Play?](http://highscalability.com/blog/2017/12/11/netflix-what-happens-when-you-press-play.html)
 	* [Monzo: How Peer-To-Peer Payments Work](https://monzo.com/blog/2018/04/05/how-monzo-to-monzo-payments-work/)
 	* [Transit and Peering: How Your Requests Reach GitHub](https://githubengineering.com/transit-and-peering-how-your-requests-reach-github/)
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