1. Operating and Filing Systems Standard Grade1 Operating and Filing Systems Standard Grade Computing Studies

2. Operating and Filing Systems Standard Grade2 What is an Operating System ? An operating system is a program (or suite of programs) that provides a computer system with its basic functions.

3. Operating and Filing Systems Standard Grade3 What does an operating system do? provides an HCI manages input/output devices memory management file management error reporting The keyword is ……. Standard functions of an operating system management

4. Operating and Filing Systems Standard Grade4 Operating Systems can be classified as interactive real-time known response time

5. Operating and Filing Systems Standard Grade5 Filing Systems A filing system is part of the operating system that deals with files on the backing storage There are two types of files data file program file

6. Operating and Filing Systems Standard Grade6 Hierarchical Filing Systems Folders and sub folders Root directory Computing SpreadsheetsDatabasesProgramming EnglishMaths

7. Operating and Filing Systems Standard Grade7 Directory and catalogue An area where files are stored is called a directory A list of files is called a catalogue

8. Operating and Filing Systems Standard Grade8 Background job A program that is running and isn't receiving user input while the computer is being used for something else. Examples: Sending a document to the printer while you continue to work on the document. Listening to an MP3 track and wordprocessing at the “same” time.

9. Operating and Filing Systems Standard Grade9 Sequential access Reading or writing data records in sequential order, that is, one record after the other. To read record 10, for example, you would first need to read records 1 through 9. Example – magnetic tape

10. Operating and Filing Systems Standard Grade10 Random access Read and write records in any order Also called direct access Example - disc

11. Operating and Filing Systems Standard Grade11 Device drivers A program that converts the output from one device into data that another device can process. A printer driver is a program which converts the data to be printed to the form specific to a printer. E.g. - how to access the printer, and printer capabilities (such as page size and resolution)

12. Operating and Filing Systems Standard Grade12 Operating and Filing Systems End of presentaion