Operating system

Operating system

1. Concept

   • Operating systems are a set of orders and programs that control the basic processes of a computer and allow the operation of others programs

2. Types of operating systems

   • Multiprocessor systems
     • Also called parallel systems or closely coupled, the systems Multiprocessors have two or more CPUs that they share buses and sometimes the clock, memory and peripheral devices.
   • Monoprocessed system
     • In the system there is only one processor a single unit of Central processing (CPU) capable of running a series of instructions of a general nature.

3. Features of the operating system

   • Resource management between processes.
     • Computing resources include devices peripherals (such as printers and DVD players) and equipment functionalities.
   • Maintaining security
     • Protects computing resources from the entry of unauthorized persons: this is done creating accounts for different users
     • Establish privileged instructions and privilege level control for maintain security against attacks internal.