System software cannot handle technical details without user intervention. 

Starting or restarting a computer is called tasking the system. 

The operating system allows the user to interact with the application programs and computer hardware through a user interface. 

In a network environment, the network server computer coordinates all communications between the other computers. 

A standard desktop computer comes with an embedded operating system. 

The operating system is often referred to as the software platform. 

Smartphones generally include a network operating system. 

Because Mac OS X market share is so large, more application programs are developed to run under Mac OS X than any other operating system. 

Linux is a popular and powerful alternative to the Windows operating system. 

When a single physical computer runs a special program known as virtualization software, it operates as though it were two or more separate and independent computers, known as virtual machines. 

Google's Chrome OS integrates with web servers using cloud computing and storage to run applications and to perform other functions. 

Based on the MAC OS, Android is designed for Apple's iPhone, iPod Touch, and iPad. 

Programs such as word processors and spreadsheets are known as utilities. 

Running File History improves system performance.