LCD screen displays text and images made up to individual dots of color called pixel.
contains microprocessor that detects which key has been pressed and sends a signal to the control processing unit.
As the mouse is moved it sends co-ordinates to the computer, which moves the cursor on the screen.
the central processing unit is the brains of the
computer and carries out calculations and instructions.
This is the main circuit board.it connects the computer’s key components and passes on instructions.
External devices such as flash sticks (pen drives), printers, scanners, digital music player, digital camera and
smartphones can be plugged in.
This magnetic disk is located within the main body of the computer and stores the computer’s programs and data.
Read Only memory. This holds permanent data that remains ever when the computer is switched off.
Random Access Memory. This holds data temporarily. The data is lost when the computer is switched off, unless user has saved it.
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.
This ultra-thin laptop computer fits in a bag and weighs just 1.4kg (3lb).
Data storage (History)
magnetic tape &
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.
Named after Ada, Countess of Lovelace, a pioneer of programming.
Beginners All-purpose Symbolic Instruction Code.
pronounced C-sharp, it gets its name from music
Common Business Oriented Language
Named after Java coffee, because inventors thought their language just as strong and reach!
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!