Software intangible is the whole set of data and computer software.
■ Hardware are the physical devices such as motherboard, CPU or monitor.
■ The interaction between software and hardware makes the machine operation, ie sends instructions to Hardware Software enabling its operation.
Beyond the popular hardware definition is what you hit when software fails, the hardware are all physical devices and components and tangible form a computer as the CPU or motherboard, while the software is the logical equipment and intangible as programs and data stored on your computer.

Hardware
Components and Hardware devices are divided into Basic and Hardware Additional Hardware

The Basic Hardware: they are fundamental and essential parts for the computer to function as: Motherboard, monitor, keyboard and mouse.
The Supplementary Hardware are all those non-essential additional devices such as: printer, scanner, digital video camera, webcam, etc.
Board or motherboard
The most important hardware components of the computer and essential to its operation are on the motherboard (also known as motherboard), a printed circuit board that houses the Central Processing Unit (CPU) or microprocessor, chipset ( auxiliary integrated circuit), RAM, or Flash-ROM BIOS, etc.. as well as communicate with each other.

Hardware Groups
According to their functions, hardware components and devices are divided into several groups
Input Devices
Input Devices are those through which data is sent outside the central processing unit, such as keyboard, mouse, scanner, or microphone, among others.

Chipset (Chipset)
The Chipset Chipset or the spinal cord of the computer, built into the motherboard, enables this function as the axis of the system allowing data traffic between the microprocessor (CPU) and the remaining components of the motherboard, interconnected via various buses that are: Northbridge (North Bridge) and the Southbridge (South Bridge).

The Northbridge or North Bridge is an integrated circuit that makes a bridge between the microprocessor and memory in addition to the video graphics card or AGP or PCI-Express, as well as communications with the South Bridge.

The Southbridge and South Bridge (also known as Hub Controllers Input / Output) is an integrated circuit that coordinates within the board's input and output devices as well as some other features of low speed. The South Bridge is connected to the CPU through the North Bridge.

Central Processing Unit (CPU)
The CPU (Central Processing Unit or Central Processing Unit) can be composed of one or more integrated circuit chips which are responsible for interpreting and executing instructions, and to administer, coordinate and process data, is ultimately the brain of the system computer. In addition, the computer speed depends on the speed of the CPU or microprocessor which is measured in Mhz (unit of measurement of the speed of processing). It is divided into several records:

Control Unit
The Control Unit is responsible for checking that instructions are executed, looking them up in the main memory, decoding (interpreting) and then be executed in the processing unit.

Arithmetic-Logic Unit
Arithmetic-Logic Unit is the processing unit which carries out the execution of arithmetic instructions and logical.

Storage Unit
The storage or memory unit stores all data that is processed in the computer memory is divided into Primary and Secondary or Auxiliary Memory.

Home or Primary Memory (RAM - ROM)
In main memory or primary computer memories are RAM, ROM and cache.

The RAM (Random Access Memory or Random Access Memory) is an integrated circuit or chip that stores the programs, data and results performed by the computer and temporarily, as its contents are lost when it goes off. It is called random access - or direct access - because you can access any memory location without having to follow an order. The RAM can be read and written so that its contents can be modified.

Memory ROM (Read Only Memory or Read-Only Memory) chips is recorded in a series of programs by the hardware manufacturer and is read-only, so it can not be changed - at least not quickly or easily - and also unaltered by power cuts. In this memory values are stored routines for boot or startup and configuration.

The cache or RAM cache is a high-speed auxiliary memory, which is just a shortcut copy of main memory stored in the RAM modules.

Secondary Memory (Hard Drive, floppy disk, etc.).
Secondary Memory (also called storage device) consists of all devices capable of storing data that can be internal devices such as hard disk, or removable media such as floppy disks (diskettes), CDs, DVDs, etc.

Output Devices
The output devices are those that receive the data processed by the computer and allow externalized through peripherals such as monitor, printer, scanner, plotter, speakers, etc.

Input / Output (Peripherals mixed): There are devices that are both input and output such as these storage peripherals, CDs, DVDs, as well as modems, faxes, USBs, or network cards.

Software
The Software is the software and intangible that allows the computer to perform intelligent tasks, leading to the physical components or hardware with instructions and data through different types of programs.

The software are the application programs and operating systems, which according to the functions they perform may be classified into:

System Software
Application Software
Programming Software