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They are tools that follow instruccion perfectly and quicly.
They follow instruccions from the user and from the computer programmer.
Aplications (word processors, video games, etc) are set of instructions

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Is the part of the computer that we can touch
The hardware is the components that are interconnected. The computer needs all those components, but the are independent and we can change any of them.
The basic components are the CPU, the memory, the graphics card and the peripherals.

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The CPU (Central Processing Unit) is a big green, plastic board with a lot of chips and many other alectronic components mounted on it.
The central processing unit is also called "the processor". It is the "brain" of the computer; it looks at the information and takes decisions based on logic

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Memory stores information. There are various types of memory in the computer:

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they normally stay inside the computer

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HARD DISC: It is a set of rigid discs with a magenetic surface

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RAM: This a green plastic card with chips

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They are easy to connect and disconnect from the computer. Also, they are easy to carry

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CDS, DVDs: We call them optical memories because they use light work

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Pen drives, memory cards: They store the information in chips

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The graphics card looks similar to the RAM. It is also s green card with chips. It defines the format of the graphics and helps the processor to process the graphic faster.

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Are elements of communication between the computer and the outside world.

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Entry peripherals : Give information to the computer keyboard, mouse, mocrophone

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Exit peripherals: The computer use the exit pheriferals to give infortmation to us or to an acruator: Screen, speakers printer, ligh bulb......

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A peripheral can be both entry and exit; An example is the router to connect to the internet

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Software is the part of the computer that we can´t touch.
It is the logic that the computer follows
The programmer writes instructions. A set of instructions is program.

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There is one Os per computer; not more, not less
Thee Os defines the internal logic for the functioning of the computer.
To program the OS, we must know which are the components of the hardware and how they are connected.
-When we switch off the computer, the OS decides to first close the applications, then to transfer al data from the RAM to the HD, and finally to switch itself off

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It is stored in the hard disc (the aplications)
It can manage multile applications at the same time
It has a graphic display, so we can interract with the computer using a mouse.
It can connect to the internet
Tody, the most common operating systems are those sold by Microsoft: Windows Vista, Windows 7....

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SOmetimes we call them "programs", but any piece of software is a program, including the operating system.
Applications are programs  that we use to do things on the computer; they are our tools.
- Word, Excel, Access, PowerPoint....
An "application suite" is a group of applicatios in a package.
Applications suiten normally include a word processor, a spreadsheet, a web browser and others applications.

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They are to make presentation

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To write texts, books......

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All the thing that we can do in Word are in the menus, but sometimes it is faster to use the special keys of the keyboard