Assalamualaikum WBT. Welcome to the blog of Learning Operating Sytem. This blog is produced to share any information , notes and other material related to subjects operating system in polytechnics Malaysia . Basically , this blog is devoted to EC503 code. However , the contents of the subject may be found similarity with other subjects . Therefore , do not be a problem if you are studying a subject other than ec503 to take advantage of this. I hope you are happy and willing to give any constructive comments on the blog. Do not be shy to take any information from this blog , but you have to put a link of this blog if you want to copy and paste them to another place. Please come again and do not forget to invite your friends to come to this. Faizal Bin Mohamad Twon Tawi Lecturer Of Electrical Enggineering Politeknik Seberang Perai Malaysia