Unit 3 includes:
OS
FUNCTIONS OF OS
LIBRARIES
SOFTWARE DEVELOPMENT ENVIRONMENT
FILE TRANSFER
FORMATTING
COMPRESSION
SYSTEM RESTORE
DISK DEFRAGMENTATION
CONTROL PANEL
SYSTEM MAINTENANCE
VIRUS PROTECTION
FIREWALL
WORD PROCESSING
SPREADSHEETS
PRESENTATION
DATA BASE
DRAWING
OS
FUNCTIONS OF OS
LIBRARIES
SOFTWARE DEVELOPMENT ENVIRONMENT
FILE TRANSFER
FORMATTING
COMPRESSION
SYSTEM RESTORE
DISK DEFRAGMENTATION
CONTROL PANEL
SYSTEM MAINTENANCE
VIRUS PROTECTION
FIREWALL
WORD PROCESSING
SPREADSHEETS
PRESENTATION
DATA BASE
DRAWING
Operating System
The operating system managing recourses and provides user interface.
-Mac OS X
-Linux
-Windows
-Android
-iOS
The operating system managing recourses and provides user interface.
-Mac OS X
-Linux
-Windows
-Android
-iOS
Functions of the OS:
-interface - provides an interface so it is easy to interact with the computer(GUI-screen and pictures, CLI-characters, MENU-icons and menus)
-manages the CPU - runs applications and executes and cancels processes
-multi-tasks - allows multiple applications to run at the same time (more than one window open at a time)
-manages memory - transfers programs into and out of memory, allocates free space between programs, and keeps track of memory usage
-manages peripherals (devices) - opens, closes and writes to peripheral devices such as storage attached to the computer
-organises - creates a file system to organise files and directories
-security - provides security through user accounts and passwords
-utilities - provides tools for managing and organising hardware
Commonly used programs
-Libraries- a file that provides functions that are not included in the core part of the programming language (e.g pickle, random, time function in python).
-Software Development Environment
Disk Organisation
-File Transfer- moving a file from one place to another (rename, copy & paste, save, move)
-Formatting- wipes it of all data(re-writeable CD)
-Compression- provides space for storing and backing up (archiving-see unit 4)
Utilities
-System Restore- saves and restores back to a certain time
-Disk Defragment-speeds up computer by rearranging files so that the files you want are more accessible (when deleting files if there are holes it pushes files down so there aren't any gaps)
-Control panel- allows you to access all the information on your computer form a screen, icons are pressed to provide access to data.
-System maintenance tool- clean up tool gets rid of all unwanted files- trashcan, press F1 for help
-Virus protection- anti-virus protection software detects and blocks viruses (if a virus is detected trying to get through the firewall, the software will give an alert and ask how you want to respond to it)
-Firewall- stops attacks on your computer by filtering through your data packets and if the data is unauthorised-doesnt follow a set of rules-it is blocked) 'I cant access the website it's blocked'=firewall action
-interface - provides an interface so it is easy to interact with the computer(GUI-screen and pictures, CLI-characters, MENU-icons and menus)
-manages the CPU - runs applications and executes and cancels processes
-multi-tasks - allows multiple applications to run at the same time (more than one window open at a time)
-manages memory - transfers programs into and out of memory, allocates free space between programs, and keeps track of memory usage
-manages peripherals (devices) - opens, closes and writes to peripheral devices such as storage attached to the computer
-organises - creates a file system to organise files and directories
-security - provides security through user accounts and passwords
-utilities - provides tools for managing and organising hardware
Commonly used programs
-Libraries- a file that provides functions that are not included in the core part of the programming language (e.g pickle, random, time function in python).
-Software Development Environment
Disk Organisation
-File Transfer- moving a file from one place to another (rename, copy & paste, save, move)
-Formatting- wipes it of all data(re-writeable CD)
-Compression- provides space for storing and backing up (archiving-see unit 4)
Utilities
-System Restore- saves and restores back to a certain time
-Disk Defragment-speeds up computer by rearranging files so that the files you want are more accessible (when deleting files if there are holes it pushes files down so there aren't any gaps)
-Control panel- allows you to access all the information on your computer form a screen, icons are pressed to provide access to data.
-System maintenance tool- clean up tool gets rid of all unwanted files- trashcan, press F1 for help
-Virus protection- anti-virus protection software detects and blocks viruses (if a virus is detected trying to get through the firewall, the software will give an alert and ask how you want to respond to it)
-Firewall- stops attacks on your computer by filtering through your data packets and if the data is unauthorised-doesnt follow a set of rules-it is blocked) 'I cant access the website it's blocked'=firewall action
Application Software
-Word Processing -writing reports, memos, letters to customers (e.g. word, email)
-Spreadsheets- keeping simple company accounts, calculating employee commission payments (Edexcel)
-Presentation- creating presentations to show to customers or staff (Powerpoint)
-Database- keeping customer records, sales records, appointment system (Edexcel)
-Drawing- manipulating images that can be used at home, school or businesses (Photoshop)
-Word Processing -writing reports, memos, letters to customers (e.g. word, email)
-Spreadsheets- keeping simple company accounts, calculating employee commission payments (Edexcel)
-Presentation- creating presentations to show to customers or staff (Powerpoint)
-Database- keeping customer records, sales records, appointment system (Edexcel)
-Drawing- manipulating images that can be used at home, school or businesses (Photoshop)