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README.md

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-# study
-Some projects from the courses and coding practice
+# Operating Systems 50300
+Projects in C, Linux based systems.
+- Shell: System calls
+- Inter-process communication: SHM and UnixSocket
+- Matrix multiplication & producer-consumer: multithreading using PThreads
+- Elevator Problem: multithreading using PThreads
+- Slab Memory Allocator: an implementation of malloc and free
+- System performance measurement
+
+# Introduction to Algorithms 50300
+Project in Java
+- Hoffman compression and decompression: input is 1 GB text file based on ASCII encoding. 
+  Performance is measured using the correctness and compression/decompression time. 
+  Test environment: VirtualBox + Ubunti (4G virtual memory), i7-3250M
+  Result: about 40 seconds to compress and 30 seconds to decompress
+
+