Computer Anatomy (Monitor, Keyboard, Mouse, CPU, Hard Disk, Motherboard, RAM, ROM, Ports) , Data Storage History and Geek Speak (program)

Monitor

LCD screen displays text and images made up to individual dots of color called pixel.


Keyboard

contains microprocessor that detects which key has been pressed and sends a signal to the control processing unit.

Mouse

As the mouse is moved it sends co-ordinates to the computer, which moves the cursor on the screen.

CPU

the central processing unit is the brains of the

computer and carries out calculations and instructions.

Motherboard

This is the main circuit board.it connects the computer’s key components and passes on instructions.

Ports

External devices such as flash sticks (pen drives), printers, scanners, digital music player, digital camera and

smartphones can be plugged in.

Hard disk

This magnetic disk is located within the main body of the computer and stores the computer’s programs and data.

ROM

Read Only memory. This holds permanent data that remains ever when the computer is switched off.

RAM

Random Access Memory. This holds data temporarily. The data is lost when the computer is switched off, unless user has saved it.

1995

The first electronic computer used so much power that all the lights in a nearby town dimmed every time it was

switched on. It weighed in at about 30 tonnes.

2008

MacBook Air

This ultra-thin laptop computer fits in a bag and weighs just 1.4kg (3lb).

Data storage (History)

1940s

punched cards


1950s

magnetic tape &

Hard disk

1970

floppy disks

1990s

rewritable disks

2000s

DVDs &

USB flash sticks

Geek speak (Program)

Programs are sets of instructions that tell a computer what to do, written in a code called a programming language.

There are lots of languages, all designed to suit different types of programs.

Ads

Named after Ada, Countess of Lovelace, a pioneer of programming.

BASIC

Beginners All-purpose Symbolic Instruction Code.

c#

pronounced C-sharp, it gets its name from music

COBOL

Common Business Oriented Language

FORTRANĀ 

FORmula TRANslation

JAVA

Named after Java coffee, because inventors thought their language just as strong and reach!

PASCAL

Named after French mathematician and writer Blaise Pascal


WEIRD OR WHAT?

The first computer “bug” was actually a moth that got trapped inside a computer at Harvard University, USA, in 1945. Perhaps it was looking for a “byte” to eat!

Ravindra Paradhi

Engineer & Blogger.

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