WEEK 1 & WEEK 2

I was late for school for 2 weeks. That's why i was so nervous when i first came here - AIU. My first day studying ICT lessons started from week 3. I did not know what the lecturer had taught in 2 weeks before. But he showed me how to create a blog and asked me to post an entry after finishing each class.

After finding out and asking the lecturer, I have known 'what is computer', computer operations,....

I also know about information processing cycle, computer analogy - characteristics, and the most important is computer components which are hardware-the physical parts and software-the set of instructions/programs

 

         Let's talk about Computer hardware basics. I have found out what are number systems including Decimal, Binary, Octal and Hexadecimal. and how to convert a number string from a number system to the others

Decimal number systems: it uses ten numberals to form a string of numbers. The values are 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. Written as X₁₀ , X is any number string/pattern.

Binary number systems: it uses 2 numberals/digits to form a string of numbers. They are 0 and 1. also known as BITS. Written as X₂ , X is any number string/pattern. This is the number system used by computers.

Octal number systems: it uses eight numberals to form a string of numbers. They are 0, 1, 2, 3, 4, 5, 6 and 7. Written as X₈, X is any number string/pattern.

Hexadecimal number systems: it uses 16 symbols (numberals + letters) to form a string of numbers. They are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D and E. Also known as Hex. Written as X₁₆, X is any number string/pattern.

• A bit is the most basic unit of information in a computer.
• A byte is a group of 8 bits.
• A word is a contiguous group of bytes.