PC Types & Functions Lesson 2. List all the different types of computer devices that you use. Briefly describe what you use each device for.

Advanced Computer Applications

PC Types & Functions

Lesson 2

List all the different types of computer devices that you use.

Briefly describe what you use each device for.

DO NOW 9/8

Identify the different computer types.

Define the four basic computer functions.

Describe computer input devices.

Understand the functions of a CPU.

OBJECTIVES

“Computer” suggests computation or calculator

Electronic device that can manipulate data

Many have to do with numbers or math

The Computer

Most familiar is the PCIndirect contact with other, larger computers

Supercomputer - science, mathematics, advanced computing, or military or industrial researchFastest problem solvers available (high speed)Process data in “parallel”

Computer Types

Very powerful

Hundreds of people can use a mainframe at once

PCs or “dumb” terminals

Mainframes

Smaller processing & storage management than mainframesAccessed also from dumb terminals or PC’sDistinction between the two has broken down in recent years (growth of the PC)

1. Computer chips/storage capacities have increased rapidly

2. Networking

Minicomputers

Desktop Computer

Laptop

PDA (Personal Digital Assistant)

Computer Types

Smartphone

E-reader

Tablet

Computer Types

INPUT

KeyboardMouse

ScannerVoice

Microphone

PROCESSING

CPURAMROM

OUTPUT

PRINTER MONITOR

STORAGE

CD-ROMCD-RW

CD-DVDDISKETTES

FLASH DRIVESHARD DRIVE

TAPE

Four Basic Functions:

KeyboardStandardized layout

Some change the location of certain keys or include keys that other keyboards do not

Special keys (Function, Ctrl, Alt)

Input Devices

Mouse

Control a pointer that displays on the monitor

Input Devices

ScannersCreate files from pictures or textOptical Character Recognition (OCR)

Voice input Microphones

Input Devices

CPU – (Central Processing Unit) Brain of the computer

Control Unit ALU Registers

PC Internal Components

CPU

Controls and coordinates program instructions & processing of data

Determines which devices have access to various parts of the system

Tell the ALU and registers how to operate, what to operate on, and what to do with the result

Control Unit

Performs and controls all arithmetic and logical operationsRelieves the control unit of most of the arithmetic functions

Performs +, -, *, /Logic commands: AND, OR, and NOT

Takes data from registers

Arithmetic Logic Unit

Storage area for data used by the ALU

Complete the tasks by the Control Unit

Data stored at special locations within the Registers

Retrieval for the ALU quick and efficient

Registers

Where programs and data reside while in use

Excel example

Saving a document: RAM to permanent storage

Loss of power information in RAM is lostRAM capacity is measured in megabytes

Random Access Memory (RAM)

Memory read from but not written to

Non-volatile memory

Computer start-up (BIOS, CMOS, POST)

ROM access slower than RAM

Read Only Memory (ROM)

Work on your projects with your partner. Due Thursday 9/11

Famous Persons in Computer History

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