https://askpakchairul.files.wordpress.com/2015/05/input-devices.docx
https://askpakchairul.files.wordpress.com/2015/05/sensors.docx
https://askpakchairul.files.wordpress.com/2015/05/output-devices.docx
https://askpakchairul.files.wordpress.com/2015/05/storage-devices.docx
https://askpakchairul.files.wordpress.com/2015/05/communication.docx
https://askpakchairul.files.wordpress.com/2012/01/test-igcse-input-output-storage.docx
https://askpakchairul.files.wordpress.com/2012/01/0420-nos_as_11.pdf
https://askpakchairul.files.wordpress.com/2015/05/converting-hexadecimal-to-decimal.pdf
http://eastaughs.fsnet.co.uk/cpu/index.htm
https://askpakchairul.files.wordpress.com/2012/01/microprocessors-complete.pdf
http://web.eecs.utk.edu/research/cs100modules/module1/index.html
https://www.youtube.com/watch?v=04UGopESS6A
https://askpakchairul.files.wordpress.com/2012/01/operating-systems-buffer-interrupts-dll.pdf
https://askpakchairul.files.wordpress.com/2012/01/error-detection-on-data-transmissions.pdf
Data communications and networking IGCSE (CIE .pdf)
Data communications and networking (Curtin .ppt)
Data communications and networking: Terminology (quizlet.com link)
Internet Security: Hacking, viruses, phishing, pharming, etc. (CIE Revision link)
Data communications and networking Quiz 1
Data communications and networking Quiz 2
https://sites.google.com/view/mr-coopers-computing-gcse/paper1-theory/1-4-security?authuser=0
http://www.igcseict.info/theory/5/anadig/
https://askpakchairul.files.wordpress.com/2015/05/logic-gates.pdf
https://askpakchairul.files.wordpress.com/2012/01/test-computerstudies-binary-systems-3s1-3s2.docx
https://askpakchairul.files.wordpress.com/2012/01/logic-gates-pre-exam-exercises.docx
https://sites.google.com/view/mr-coopers-computing-gcse/paper1-theory/1-4-security?authuser=0
https://sites.google.com/view/mr-coopers-computing-gcse/paper1-theory/1-5-ethics?authuser=0
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