Update OperatingSystem-Reference.md

Awesome-Reference/Infrastructure/OS/OperatingSystem/OperatingSystem-Reference.md

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 * [Why Raspberry Pi Isn't Vulnerable to Spectre or Meltdown](http://t.cn/RH3DVKj): To help us understand why, here’s a little primer on some concepts in modern processor design.
 
+# GPU
+
+- [Interactive GPU Programming](https://parg.co/UiQ): I will explore major CUDA and OpenCL topics in detail.
+
 # Scheduler: 调度
 
 * [os_process_scheduling_algorithms](http://www.tutorialspoint.com/operating_system/os_process_scheduling_algorithms.htm)