EOY - computing Y9 Flashcards
Algorithm
A set of instructions that achieve a task
Sequence
Following instructions one after the other
Variable
A named container for a value (which can be inspected or altered by the program)
Iteration
A repeated set of instructions – common loops include forever, while true, while
Selection
A choice of which set of code to follow is dependent on a true of false question – common selections are “if then else”, “when..do”
Program
A set of algorithms that have been created to solve a problem – commonly known as apps (application software)
Input
A method of entering data onto a computer system, usually with an input device, such as a keyboard or mouse
Output
A method of displaying information to a user e.g. a screen
CPU
The central processing unit – every command passes through the CPU
RAM
Random access memory, very fast, volatile data storage, contains the operating system, current programs and data
ROM
Read only memory, non-volatile memory, contains the boot strap and BIOS
Volatile
Data is lost when the machine is turned off
BIOS
Basic input and output system
Motherboard
A circuit board that connects all of the other components
HTML
Hypertext markup language – used to create webpages