Summary Computer systems mindmap for AQA computer science GCSE

HARDWARE components ARCHITECTURE
physical VON NEUMANN
-




SOFTWARE that run) on
computer Arithmetic Unit (ALU) and
any program perform logical
a

Logic
:
-




software for computer function
programs
↳

system
-




arithmetic operations
enable to a task
application software user)
perform
-




Control Unit
~



coordinates activities
-




TRANSLATORS

OPERATING SYSTEM SOFTWARE CPU
-Clock-synchronises operations processor timing
-



code
assembly language machine
>
ASSEMBLER
-
- -




processor management
-




multitasking COMPILER level code
-




Register
location
high memory
-

-
>
-
machine

allocates blocks of free to each active ↓ tr

memory management space program
-




code
object code
and data between
source Bus connects
passes components
devices devices each device has its own device driver
inpur/ourpur manage
-




,

faster customers ~
bus
execure)
,
can't see
Address bus Control Data bus
files
, ,
and data
application management maintaile applications code
-




source
installed
don't need
compiler
management
user
-security safety manage
-

ensure
,


INTERPRETER level code
-




high
>
machine
-




-

one line at a time



-takel time source code
see
SYSTEMS
,

EMBEDDED


device
simple computer in a




task
-run a
simple
↳
microwaves, cameral
eg
.
-

reliable
, useable




UTILITY SOFTWARE


make it easier for to use




Computer systems
users




ENCRYPTION SOFTWARE


-keep dara safe from hackers




MAINTENANCE UTILITIES


file
-DISU DEFRAGMENTATION
groups together in
storage
-




to
quicker access



-AUTOMATIC UPDATING -

makes sure software is
up to date




COMPRESSION SOFTWARE


-reduce size of file for transmission
quicker