Revision from test.

Disk formatting zeros the disk. Formats for a particular system. E.g Ntfs

Hardware driver allows a piece of hardware to be used and interact with the computer.

File compression shrinks files. Because you either want to save hardrive space or emailing.

Virus checker uses a registered list of virus of all known virus known around the world which your computer downloads which scans your hardrive of those known files.

System Software

System Software

• Describe the purpose of operating systems.
• Describe the characteristics of different types of operating systems and their uses: batch, real-time, single-user, multi-user, multi-tasking and network systems
• Identify a range of applications requiring batch processing and a range of applications in which a real time response is required.
• Describe different types of user interface: forms, menus, GUI, natural language and command line, suggesting the characteristics of user interfaces which make them appropriate for use by different types of user.
• Describe the purpose of a range of utility software e.g. disk formatting, file handling, hardware drivers, file compression and virus checkers.

Hardware software

everything that happens in a computer goes from
Input-Processor-Output
                ||
                ||
           Storage
storage

The CPU infact dose not connect directly with the hard drive but instead with the RAM stick. As trying to connect the CPU to hard drive is like talking to someone from a jet plane to a bike.

Software:
Software= sets of instructions which will tell the system how to do something. These instructions are collected together in a workable group which is called a program.

Operating system

• User interface software

Provides a GUI
Provides a Platform for apps top so on it
Middle, am between apps and hardware e.g Word dose not know anything about printers but OS dose

• Translate software (TS)

An OS provides its own TS
Translate high level language into machine code

• Untilities

Allows you to change the sysetm to a certain extent

• Common Applications

i.e Iphoto