SE

1. OPERATING
SOFTWARE(OS)
TOPIC–FUNCTIONSOFOPERATING SOFTWARE
BY(Amit Singh)
UNIVERSITY ROLL:14501221093

2. OPERATINGSOFTWARE
• Whatisanoperatingsystem?
Anoperatingsystem (OS) isthe programthat,after
beinginitiallyloadedintothe computerbyaboot
program,managesallof theother applicationprograms
inacomputer. Theapplicationprograms makeuseof the
operatingsystem bymakingrequests forservices
throughadefinedapplicationprograminterface(API).

3. FUNCTIONSOFOS
PROCESS
MANAGEMNT
MEMORY
MANAGEMENT
FILE
MANAGEMENT
DEVICE
MANAGEMENT
SECURITY
I/OSYSTEM
MANAGEMENT
FUNCTIONSOFOPERATINGSOFTWARE
• Processmanagement:Process management
helpsOS tocreate anddelete processes. It
alsoprovides mechanismsfor
synchronizationandcommunicationamong
processes.
• Memorymanagement: Memorymanagement
moduleperforms thetaskofallocationand
de-allocation ofmemory spaceto programs
inneedof thisresources.

4. • Filemanagement:Itmanagesallthefile-
related activities suchasorganization
storage, retrieval, naming,sharing,and
protection offiles.
• DeviceManagement:Devicemanagement
keeps tracksofalldevices. Thismodule
alsoresponsible forthistaskis knownas
theI/Ocontroller. Italso performsthetask
ofallocationandde-allocation ofthe
devices.

5. • I/OSystemManagement:Oneof the main
objects ofanyOSistohidethepeculiaritiesof
thathardwaredevices fromthe user.
• Secondary-StorageManagement:Systems
haveseveral levels ofstorage whichincludes
primarystorage, secondary storage, and
cachestorage. Instructionsanddatamustbe
stored inprimarystorage orcachesothata
runningprogramcanreference it.

6. • Security:Thesecuritymoduleprotects
thedataandinformation ofacomputer
system againstmalwarethreats and
authorizedaccess.
• Commandinterpretation:Thismoduleis
interpretingcommandsgivenbythe
actingsystem resources to process
those commands.
• Jobaccounting:Keeping trackoftime&
resources usedbyvariousjobs and
users.

7. • Networking:Adistributedsystem isa
groupof processors thatdonot sharea
memory, hardwaredevices, oraclock.
Theprocessors communicatewithone
anotherthroughthenetwork.
• Communicationmanagement:
Coordination andassignmentof
compilers,interpreters, andother
software resource ofthevarioususers
ofthe computersystems.

8. We are really grateful to our OS Professor ( MS. KAJARI GHOSH) for advising us and introducing the
assignment to us in a easy to understand way which has helped us complete our assignment easily and
effectively on time. We are dearly obliged for giving us an opportunity to work on this assignment which
has provided valuable information about (Topic: FEATURES OF ‘OS’ )Thank you.