Kategorien: Alle - output - literacy - input - devices

von Akam Akam Vor 11 Jahren

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CSC 101 Knowledge Base - Roger

Computers have become integral to modern life, serving a multitude of roles across various environments such as workplaces, homes, and educational institutions. They enable users to perform tasks efficiently through the information processing cycle, which involves input, processing, output, and storage.

CSC 101 Knowledge Base - Roger

CSC 101 Knowledge Base - Akam

The World is Flat - Friedman

Flatteners
Friedman's flatteners 7, 8, 9.
Ch. 2: Flattener 4,5,6

http://friedmasflattenersakam.blogspot.com/

Ch. 2: Flattener 3
Ch. 2: Flattener 2
Ch. 2: Flattener 1
Ch. 1: while I Was Sleeping

CH. 4 - Input and Output

AUDIO OUTPUT
PRINTERS
DISPLAY DEVICES
AUDIO INPUT
SCANNERS, READERS, AND DIGITAL CAMERAS
POINTING AND TOUCH DEVICES
KEYBOARDS

CH. 3 - Storage

EVALUATING YOUR STORAGE ALTERNATIVES

Most personal computers today include a hard drive, some type of optical drive, a flash

memory card reader, and multiple USB ports that can be used to connect USB-based storage

devices, such as external hard drives and USB flash drives, as well as other USB hardware.

OTHER TYPES OF STORAGE SYSTEMS

Remote storage involves using a storage device that is not directly connected to your computer.

One example is using a network storage device, such as a network attached storage

(NAS) or storage area network (SAN).

FLASH MEMORY

Flash memory is used in a variety of storage systems. Flash memory cards, one of the

most common types of flash memory media, are commonly used with digital cameras,

portable computers, and other portable devices, as well as with desktop computers.

Intro To Computer Storage Terminology
OPTICAL DISCS

Optical discs, such as CD discs, DVD discs, and Blu-ray Discs (BDs), store data optically

using laser beams, and they can store data much more densely than magnetic disks. They are

divided into tracks and sectors like magnetic disks, but they use a single spiral track instead

of concentric tracks.

HARD DRIVES

Hard drives are used in most computers to store programs and data. Conventional hard

drives are magnetic hard drives; a newer type of hard drive that uses flash memory instead

of magnetic disks is the solid-state drive (SSD). Hard drives can be internal or external;

external hard drives can be full-sized or portable. Hybrid hard drives are a combination

of a magnetic hard drive and an SSD, containing a large amount of flash memory that

is used in conjunction with magnetic hard disks to provide increased performance while

reducing power consumption.

STORAGE SYSTEM CHARACTERISTICS

Storage systems make it possible to save programs, data, and processing results for later

use. They provide nonvolatile storage, so when the power is shut off, the data stored on

the storage medium remains intact.

CH. 2 - The System Unit: Processing and Memory

MAKING COMPUTERS FASTER AND BETTER NOW AND IN THE FUTURE

There are several possible remedies for a computer that is performing too slowly, including

adding more memory, performing system maintenance to clean up the computer’s

hard drive, buying a larger or additional hard drive, and upgrading the computer’s Internet

connection or video card, depending on the primary role of the computer and where the

processing bottleneck appears to be. To make computers work faster overall, computer

designers have developed a number of strategies over the years, and researchers are continually

working on new strategies. Some of the strategies already being implemented include

improved architecture, pipelining, multiprocessing, parallel processing, and the use of

new or improved materials.

DATA AND PROGRAM REPRESENTATION

Most digital computers work in a two-state, or binary, fashion. It is convenient to think of

these binary states in terms of 0s and 1s. Computer people refer to these 0s and 1s as bits.

Converting data to these 0s and 1s is called digital data representation.

Video about processors

How processors are built

INSIDE THE SYSTEM UNIT

Personal computers typically contain a variety of hardware components located inside the

system unit. For instance, chips are mounted onto circuit boards, and those boards are positioned

in slots on the motherboard—the main circuit board for a computer. Every computer

has a central processing unit (CPU) or processor—also called a microprocessor when

referring to personal computers—attached to its motherboard that performs the processing

for the computer. CPU chips differ in many respects, such as what types of computer the CPU

is designed for, its clock speed, and word size. They can also be multi-core CPUs, such as

the dual-core (two cores) and quad-core (four cores) CPUs now available. Another difference

is the amount of cache memory—memory located on or very close to the CPU chip

to help speed up processing. Other important differences are the general architecture of the

CPU and the bus speed and width being used. The overall processing speed of the computer

determines its performance. One of the most consistent measurements of overall performance

is a benchmark test.

Memory refers

HOW THE CPU WORKS

CPUs today include at least one arithmetic/logic unit (ALU), which performs integer

arithmetic and logical operations on data, and most include at least one floating point

unit (FPU), which performs decimal arithmetic. The control unit directs the flow of electronic

traffic between memory and the ALU/FPU and also between the CPU and input

and output devices. Registers—high-speed temporary holding places within the CPU that

hold program instructions and data immediately before and during processing—are used

to enhance the computer’s performance. The prefetch unit requests data and instructions

before or as they are needed, the decode unit decodes the instructions input into the CPU,

internal cache stores frequently used instructions and data, and the bus interface unit

allows the various parts of the CPU to communicate with each other.

Random and Sequential Access

CH.1 - Introduction to the world of computers

COMPUTERS AND SOCIETY

Computers and devices based on related technology have become indispensable tools for

modern life, making ordinary tasks easier and quicker than ever before and helping make

today’s worker more productive than ever before.

COMPUTER NETWORKS AND THE INTERNET

Computer networks are used to connect individual computers and related devices so that

users can share hardware, software, and data as well as communicate with one another.

The Internet is a worldwide collection of networks.

COMPUTERS TO FIT EVERY NEED

Embedded computers are built into products (such as cars and household appliances)

to give them added functionality. Mobile devices are small devices with computing or

Internet capabilities; a mobile device based on a mobile phone is called a smartphone.

What is a computer?
WHAT IS A COMPUTER AND WHAT DOES IT DO?

A computer is a programmable electronic device that accepts input; performs processing

operations; outputs the results; and provides storage for data, programs, or output when

needed. Most computers today also have communications capabilities. This progression

of input, processing, output, and storage is sometimes called the information processing

cycle.

COMPUTERS IN YOUR LIFE

Computers appear almost everywhere in today’s world, and most people need to use a

computer or a computerized device frequently on the job, at home, at school, or while

on the go. Computer literacy, which is being familiar with basic computer concepts,

helps individuals feel comfortable using computers and is a necessary skill for everyone

today.