WEEK 1&2 (end =))

I will end what i have known about this 2 week by posting about computer hardware basics, which are motherboard, CPU and main memory
Motherboard is the main circuit board in system unit – a case that contains electronic components (processor, memory, expansion cards…) and most storage devices.

The CPU – Central Processing Unit includes two parts: Control Unit (CU) and Arithmetic Logic Unit (ALU).

The next is about the Main Memory of computer hardware basics.

There are two types of memory:

–      Ram (random access memory): It holds the program instructions and data that is being used by the processor – it loses its contents when power is turned off.

–      Rom (read only memory): it holds the program instructions and settings required to set up the computer – it does not lose the contents when power is turned off.

 Then, it's about Input and Output.

• Input is any data and instructions entered into the memory of a computer - can be in the form of programs, commands, and user responses. They are the keyboard, pointing devices, game controllers, digital cameras, voice input, video input, scanner and reading devices, Biometric Input and terminals.

• Output is data that has been processed into a useful form. An output device is any type of hardware component that conveys information to one or more people. They are Display devices, Printers (impact printer and non-impact printer), audio output device, data projector, force feedback...

Input devices

 output devices

Finally, i will talk about the storage, which holds data, instructions and information for future use. There are many types of storage such as: hard disks, plash memory storage, optical discs, and others.

WEEK 1&2 (continue^^)

Going on with this topic.  I shall tell what i know in week 2. It's about the computer history, computer architecture, categories of computers, computer hardware basics....

These are about the computer development:

• Pre computers and early computers (before 1940s).
• First generation (1940-1950): Vacuum Tube.
• Second generation (1950-1964): Transistors.
• Third generation (1964-1974): Integrated Circuits (IC).
• Fourth generation (1974-present): VLSI (very large-scale. integration)/ ULSI (ultra large- scale integration).
• Fifth generation (now and the future).

 Computer architecture

There are 6 Categories of computer based on size, capability and price:

1.  Embedded computers:

2.  Mobile devices/ computers

3.  Personal computers

4.  Midrange servers

5.  Mainframes 

6. Supercomputers

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.