System software...
controls the hardware
handles real world jobs that users want to do
has limited functionality and is used to maintain computer systems
Application software (e.g. word processors, hotel booking systems, e.t.c.)...
controls the hardware.
handles real world jobs that users want to do.
has limited functionality and is used to maintain computer systems.
Utility software (e.g. firewalls, system cleanup, defragmentation)...
has full functionality and is used to maintain computer systems.
has limited functionality and is used to maintain applications.
The operating system is a set of programs that...
controls the hardware and lets users work with the computer.
lets users and applications work with the computer.
controls the hardware and lets users and applications work with the computer.
A user interface of a computer is...
the boundary between human user and the machine.
the boundary between human user and the internet.
the boundary between human user and an application.
A command line interface requires users to...
type commands.
click on icons.
type responses.
A graphical user interface (GUI) uses images, known as icons to represent resources, files, programs and actions. GUI's are useful because...
they are intuitive and the user does not need to learn commands.
keyboard use is minimal and the user does not need to learn commands.
they are intuitive, keyboard use is minimal and the user does not need to learn commands.
Operating systems to need to manage memory and decide what goes where in memory. They have to make sure that...
1)memory is used efficiency. 2) important data is not overwritten during the running of a program.
1)memory is used efficiency. 2) important data may be overwritten during the running of a program.
1)memory is used efficiency. 2) important programs are not overwritten during the running of a program.
Operating systems organise files on secondary storage. Most use hierarchical systems: - Files are stored in directories. - Directories can include sub-directories. A directory is a...
random grouping of files. In a Windows based system directories are often called folders.
logical grouping of files. In a Windows based system directories are often called files.
logical grouping of files. In a Windows based system directories are often called folders.
Privileges are the rights assigned to users and groups. They may include features such as whether for a particular file the user can:
read (view it) - write (change it) - execute (run it if it is a program)
read (view it) - protect (secure access) - execute (run it if it is a program)
write (change it) - protect (secure access) - execute (run it if it is a program)
Custom written software is...
software specifically created for a particular users needs
software that can be bought from a supplier and is ready to install. It may have additional features that the user does not need.
software placed in the public domain by programmers. They often produce software to improve their skills or for the public good.
software that is developed for profit by a company. The source code is retained as a valuable trade secret. Users but a license to use it.
Open source software is...
Off the shelf software is...
Proprietary software is...