- listening to music
- playing the game
- search the homework
- talking with friends by msn
- prepared homework by using the office programme
- watching the films
- using the programmes for engineering and architect
PC System
Control unit
The control unit (often called a control system or central controller) directs the various components of a computer. It reads and interprets (decodes) instructions in the program one by one. The control system decodes each instruction and turns it into a series of control signals that operate the other parts of the computer.Control systems in advanced computers may change the order of some instructions so as to improve performance.
Arithmetic/logic unit (ALU)
The ALU is capable of performing two classes of operations: arithmetic and logic.
Memory
Computer main memory comes in two principal varieties: random access memory or RAM and read-only memory or ROM.
Input/output (I/O)
I/O is the means by which a computer receives information from the outside world and sends results back. Devices that provide input or output to the computer are called peripherals. On a typical personal computer, peripherals include input devices like the keyboard and mouse, and output devices such as the display and printer. Hard disk drives, floppy disk drives and optica disc drives serve as both input and output devices. Computer networking is another form of I/O.
How computers work
A general purpose computer has four main sections: the arithmetic and logic unit (ALU), the control unit, the memory, and the input and output devices (collectively termed I/O). These parts are interconnected by busses, often made of groups of wires.
The control unit, ALU, registers, and basic I/O are collectively known as a central processing unit (CPU). Early CPUs were composed of many separate components but since the mid-1970s CPUs have typically been constructed on a single integrated circuit called a microprocessor.
1. Access this website:
http://electronics.howstuffworks.com/laptop.htm
- Explain how laptops differ from desktops.
They're completely portable, and they use less power and make less noise than desktop models.
Laptops are also more expensive than desktops.
But, they're often a little slower and have less graphics and sound processing power, although these differences can be too small for most users to notice
Laptops are also more expensive than desktops.
What are the main features of laptop components?(Processor, memory and storage, display and sound, power supplies
A laptop, however, is much smaller and lighter than even the most compact PC tower. Its screen is an integrated part of the unit, as is its keyboard. Instead of a spacious case with lots of room for air circulation, a laptop uses a small, flat design in which all the pieces fit together snugly.
Because of this fundamental design difference and because of a laptop's inherent portability, components have to:
Fit into a compact space
Conserve power
Produce less heat than desktop components
What are whitebooks?
A modded or homemade laptop is called a whitebook.
Who invented the laptop?/When was it invented?
In 1979, William Moggridge of Grid Systems Corporation created the first functioning portable computer: The Grid Compass Computer 1109.
Describe what kind of laptop Gavilan computer and Apple Computer produced.
Gavilan Computer and Apple, introduced other portable computers in following years. The first commercially viable machine, however, was the IBM PC Convertible, introduced in 1986. The PC Convertible featured:
An 8088 microprocessor
256 kilobytes of memory
Two 3.5-inch (8.9-cm) floppy drives
An LCD display
Parallel and serial printer ports
Space for an internal modem
A software suite including basic word processing, appointment calendar, telephone/address book, and calculator software
Summarize the main ideas from the two video clips and paste them on your blog
1. video
Ram increases your computer´s speed. If you want to have fast computer you can add ram your laptop. Open back of the your laptop and you can slap new ram and your computer´s speed will be very fast.
2. video
When buying a laptop,we should pay attention some futures. Following to
o Processor
o Ram
o Size screen
o Hard disk
o Type of optical drive
o Wireless network
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