operating system links together the hardware and software so that you can interact with the computer. they have number of specific roles to ensure all of this happens

Resource Allocation loads programs by retrieving them from storage and placing instructions in main memory. it also gets the CPU to start processing these instructions. it will assign resources like memory and cpu power to different programs to ensure they can run.

Secuirty provides features for keeping your computer system secure.

file management

Hardware managemnt

utility applications: small programs that perform single specific tasks ,usually involving managing system resources and improving performance. example utility applications include:

Disk Defragmenters : As we delete and save new data our hard disk becomes "fragmented" . this means our data gets split up across different locations on the hard disk . this slows down the hard disks performance .

Firewalls

Anti-virus software A software application that protects us against malware ,like viruses. it does this by either

Anti-virus software A software application that protects us against malware ,like viruses. it does this by either