1. Operating Systems
Tasks
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2. Learning Objectives Discuss the purpose of operating systems.
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3. All Operating Systems:
Control the hardware of the computer system:
Memory management to control the way that primary memory is used
Resource allocation / processor / printer time
Access to peripheral devices via drivers.
User interface / HCI:
To provide human access and allows communication.
Provide environment for application software to be executed and managed:
i.e. installation to system, access to memory and allows software translation via compiler / interpreter / assembler.
Provide utilities / library routines to carry out “housework” and common tasks e.g.
File handling
Defragmenting
Formatting
Virus protection
Security
backup procedures
Privacy
logons / passwords
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4. (Hard-Drive) Utilities
Used to control communication between computer and peripherals by converting OS commands into instructions that the peripheral will understand. Supplied with a new peripheral and needs to be installed it can be used.
Program
Part of OS
Designed to carry out “housework” and common tasks.
(Hard-Drive) Utilities
To protect files from attack by virus
File Compression
Anti virus software
Defragment
Hardware Drivers
Format
Reduces size of files without loss of detail by replacing all common letter combinations by single characters and deleting redundant data so that less storage space required and faster transmission.
To keep files sensibly arranged on the hard drive
Deletes the contents of a disk, divides the surface of storage media into tracks and sectors and, produces an index before being used.
Library / File-handling
To manage the files that are stored on a computer system
Deleting Files
Search
Sort
Copy / Backup
(Organising)
New Folders & Moving files
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5. Plenary
Describe the features which an operating system would be expected to provide in a single user computer system.
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6. All Operating Systems Provide:
User interface
To allow communication/type of interface
File handling:
To allow use of secondary storage
Disk management
defragmenting / formatting / storage
Virus protection
To protect files on secondary storage
Security
backup procedures
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7. All Operating Systems Provide:
Privacy
logons / passwords
Access to peripheral devices
via drivers / allowing hard copy
Memory management
To control the way that primary memory is used
Manages application software / installation to system / access to memory
Resource allocation /processor / printer time
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