DISCOVERING COMPUTERS - Technology in a World of Computers, Mobile devices and Internet

Assalamualaikum and salam sejahtera.
Today i want to share with you guys about summary of chapter 6.

CHAPTER 6 - Inside Computers and Mobile Devices.

INSIDE THE CASE 

• The case contains and protects the electronics of the computer or mobile device from damage

         

• The motherboard is the main circuit board of the computer
• A computer chip contains integrated circuits

PROCESSORS

• The processor, also called the central processing unit (CPU), interprets and carries out the basic instructions that operate a computer
• Contain a control unit and an arithmetic logic unit (ALU)
• A multi-core processor is a single chip with two or more separate processor cores
• The control unit is the component of the processor that directs and coordinates most of the operations in the computer
• The arithmetic logic unit (ALU) performs arithmetic, comparison, and other operations
• For every instruction, a processor repeats a set of four basic operations, which consist of a machine cycle
• The leading manufacturers of personal computer processor chips are Intel and AMD
• A processor chip generates heat that could cause the chip to malfunction or fail
• Require additional cooling
• Heat sinks
• Liquid cooling technology
• Cooling mats

CLOUD COMPUTING

• Home and business users choose cloud computing for a variety of reasons
• Accessibility
• Space savings
• Scalability
• Cost savings

DATA REPRESETATION

•Analog signals are continuous and vary in strength and quality

•Digital signals are in one of two states: on or off

MEMORY

• Memory consists of electronic components that store instructions waiting to be executed by the processor, data needed by those instructions, and the results of processing the data
• Stores three basic categories of items:
• Applications
• The operating system and other programs
• Data being processed and the resulting information
• The system unit contains two types of memory : 

1. Volatile memory

• Loses its contents when power is turned off
• Example includes RAM 

     2 .Nonvolatile memory

• Does not lose contents when power is removed
• Examples include ROM, flash memory, and CMOS
• Read-only memory (ROM) - refers to memory chips storing permanent data and instructions
• Flash memory can be erased electronically and rewritten.

ADAPTERS

• An adapter card enhances functions of a component of a desktop or server system unit and/or provides connections to peripherals
• Sound card and graphics card
• An expansion slot is a socket on a desktop or server motherboard that can hold an adapter card
• With Plug and Play, the computer automatically can recognize peripheral devices as you install them
• The power supply or laptop AC adapter converts the wall outlet AC power into DC power
• Mobile computers and devices can run using either a power supply or batteries
• Batteries typically are rechargeable lithium-ion batteries