Operating System Chap.7 Application of Semaphores

Operating System Chap.6 Synchronization based on Busy Waiting

Operating System Chap.5 IPC for data passing

Operating System Chap.4 Interrupts, Exceptions, and Signals

Operating System Chap.3 Processes & Threads

Cryptography-Chap.4 Block cipher

Operating System Chap.2 CPU Mode & OS Structure

Operating System Chap.1 Inroduction

Cryptography-Chap.3 Classical cryptography

Cryptography-Chap.2 Fundamentals of number theory

MySQL Notes

Front-end Notes