Fix link to google-mobwrite

README-ja.md

@@ -1604,7 +1604,7 @@ Notes
 | Dropboxのようなファイル同期サービスを設計する | [youtube.com](https://www.youtube.com/watch?v=PE4gwstWhmc) |
 | Googleのような検索エンジンの設計 | [queue.acm.org](http://queue.acm.org/detail.cfm?id=988407)<br/>[stackexchange.com](http://programmers.stackexchange.com/questions/38324/interview-question-how-would-you-implement-google-search)<br/>[ardendertat.com](http://www.ardendertat.com/2012/01/11/implementing-search-engines/)<br/>[stanford.edu](http://infolab.stanford.edu/~backrub/google.html) |
 | Googleのようなスケーラブルなwebクローラーの設計 | [quora.com](https://www.quora.com/How-can-I-build-a-web-crawler-from-scratch) |
-| Google docsの設計 | [code.google.com](https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/) |
+| Google docsの設計 | [code.google.com](https://web.archive.org/web/20160114051031/https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/) |
 | Redisのようなキーバリューストアの設計 | [slideshare.net](http://www.slideshare.net/dvirsky/introduction-to-redis) |
 | Memcachedのようなキャッシュシステムの設計 | [slideshare.net](http://www.slideshare.net/oemebamo/introduction-to-memcached) |
 | Amazonのようなレコメンデーションシステムの設計 | [hulu.com](http://tech.hulu.com/blog/2011/09/19/recommendation-system.html)<br/>[ijcai13.org](http://ijcai13.org/files/tutorial_slides/td3.pdf) |

README-zh-Hans.md

@@ -1615,7 +1615,7 @@ Notes
 | 设计类似于 Dropbox 的文件同步服务   | [youtube.com](https://www.youtube.com/watch?v=PE4gwstWhmc) |
 | 设计类似于 Google 的搜索引擎      | [queue.acm.org](http://queue.acm.org/detail.cfm?id=988407)<br/>[stackexchange.com](http://programmers.stackexchange.com/questions/38324/interview-question-how-would-you-implement-google-search)<br/>[ardendertat.com](http://www.ardendertat.com/2012/01/11/implementing-search-engines/)<br/>[stanford.edu](http://infolab.stanford.edu/~backrub/google.html) |
 | 设计类似于 Google 的可扩展网络爬虫   | [quora.com](https://www.quora.com/How-can-I-build-a-web-crawler-from-scratch) |
-| 设计 Google 文档            | [code.google.com](https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/) |
+| 设计 Google 文档            | [code.google.com](https://web.archive.org/web/20160114051031/https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/) |
 | 设计类似 Redis 的键值存储        | [slideshare.net](http://www.slideshare.net/dvirsky/introduction-to-redis) |
 | 设计类似 Memcached 的缓存系统    | [slideshare.net](http://www.slideshare.net/oemebamo/introduction-to-memcached) |
 | 设计类似亚马逊的推荐系统            | [hulu.com](http://tech.hulu.com/blog/2011/09/19/recommendation-system.html)<br/>[ijcai13.org](http://ijcai13.org/files/tutorial_slides/td3.pdf) |

README-zh-TW.md

@@ -1605,7 +1605,7 @@ Notes
 | 設計一個類似於 Dropbox 的文件同步系統  | [youtube.com](https://www.youtube.com/watch?v=PE4gwstWhmc)                                                                                                                                                                                                                                                                                                                                                                                        |
 | 設計一個類似於 Google 的搜尋引擎       | [queue.acm.org](http://queue.acm.org/detail.cfm?id=988407)<br/>[stackexchange.com](http://programmers.stackexchange.com/questions/38324/interview-question-how-would-you-implement-google-search)<br/>[ardendertat.com](http://www.ardendertat.com/2012/01/11/implementing-search-engines/)<br/>[stanford.edu](http://infolab.stanford.edu/~backrub/google.html)                                                                                                 |
 | 設計一個像 Google 一樣可擴展的網路爬蟲 | [quora.com](https://www.quora.com/How-can-I-build-a-web-crawler-from-scratch)                                                                                                                                                                                                                                                                                                                                                                     |
-| 設計一個 Google Docs                   | [code.google.com](https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/)                                                                                                                                                                                                                                                                                                                           |
+| 設計一個 Google Docs                   | [code.google.com](https://web.archive.org/web/20160114051031/https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/)                                                                                                                                                                                                                                                                                                                           |
 | 設計一個像 Redis 一樣的鍵值對系統      | [slideshare.net](http://www.slideshare.net/dvirsky/introduction-to-redis)                                                                                                                                                                                                                                                                                                                                                                         |
 | 設計一個像 Memcached 的快取系統        | [slideshare.net](http://www.slideshare.net/oemebamo/introduction-to-memcached)                                                                                                                                                                                                                                                                                                                                                                    |
 | 設計一個像 Amazon 一樣的推薦系統       | [hulu.com](http://tech.hulu.com/blog/2011/09/19/recommendation-system.html)[ijcai13.org](http://ijcai13.org/files/tutorial_slides/td3.pdf)                                                                                                                                                                                                                                                                                                        |

README.md

@@ -1654,7 +1654,7 @@ Handy metrics based on numbers above:
 | Design a file sync service like Dropbox | [youtube.com](https://www.youtube.com/watch?v=PE4gwstWhmc) |
 | Design a search engine like Google | [queue.acm.org](http://queue.acm.org/detail.cfm?id=988407)<br/>[stackexchange.com](http://programmers.stackexchange.com/questions/38324/interview-question-how-would-you-implement-google-search)<br/>[ardendertat.com](http://www.ardendertat.com/2012/01/11/implementing-search-engines/)<br/>[stanford.edu](http://infolab.stanford.edu/~backrub/google.html) |
 | Design a scalable web crawler like Google | [quora.com](https://www.quora.com/How-can-I-build-a-web-crawler-from-scratch) |
-| Design Google docs | [code.google.com](https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/) |
+| Design Google docs | [code.google.com](https://web.archive.org/web/20160114051031/https://code.google.com/p/google-mobwrite/)<br/>[neil.fraser.name](https://neil.fraser.name/writing/sync/) |
 | Design a key-value store like Redis | [slideshare.net](http://www.slideshare.net/dvirsky/introduction-to-redis) |
 | Design a cache system like Memcached | [slideshare.net](http://www.slideshare.net/oemebamo/introduction-to-memcached) |
 | Design a recommendation system like Amazon's | [hulu.com](https://web.archive.org/web/20170406065247/http://tech.hulu.com/blog/2011/09/19/recommendation-system.html)<br/>[ijcai13.org](http://ijcai13.org/files/tutorial_slides/td3.pdf) |
@@ -1672,7 +1672,7 @@ Handy metrics based on numbers above:
 | Design a system that serves data from multiple data centers | [highscalability.com](http://highscalability.com/blog/2009/8/24/how-google-serves-data-from-multiple-datacenters.html) |
 | Design an online multiplayer card game | [indieflashblog.com](https://web.archive.org/web/20180929181117/http://www.indieflashblog.com/how-to-create-an-asynchronous-multiplayer-game.html)<br/>[buildnewgames.com](http://buildnewgames.com/real-time-multiplayer/) |
 | Design a garbage collection system | [stuffwithstuff.com](http://journal.stuffwithstuff.com/2013/12/08/babys-first-garbage-collector/)<br/>[washington.edu](http://courses.cs.washington.edu/courses/csep521/07wi/prj/rick.pdf) |
-| Design an API rate limiter | [https://stripe.com/blog/](https://stripe.com/blog/rate-limiters) |
+| Design an API rate limiter | [stripe.com](https://stripe.com/blog/rate-limiters) |
 | Design a Stock Exchange (like NASDAQ or Binance) | [Jane Street](https://youtu.be/b1e4t2k2KJY)<br/>[Golang Implementation](https://around25.com/blog/building-a-trading-engine-for-a-crypto-exchange/)<br/>[Go Implemenation](http://bhomnick.net/building-a-simple-limit-order-in-go/) |
 | Add a system design question | [Contribute](#contributing) |