1. Alumnas: María Sol Pérez Fernández y María Agustina Macchi

2. Hardware Software What is the hardware? The hardware are the physical parts of a computer system, that you can feel or touch. What is the software? The software is the set of instructions that make the computer system do something.

3. Main or Internal Memory: This is used to store all the data and instructions which the computer is going to use or the answer it has produced. ROM: Read Only Memory RAM: Random Access Memory ROM: ROM cannot be changed, even by switching the computer off. ROM would be useless for doing work or running programs, though, because we normally want to change things. RAM: RAM stores anything that needs to be changed, all the data and all the programs that are being used are stored here. Normally a computer´s RAM is more bigger than its ROM because it needs to hold far more.

4. Operating system or system software: keep the computer usable. Applications and programs: Allow users to use the computer to play a game, for example to write a letter. Examples of general –purpose applications: Word-processing memory: to produce letters and reports. Graphical User Interface: uses graphics to stand for more complicated actions that the user wants to carry out. Human Computer Interface: controls what users see on screen. Command- Line Interface: Communicate with the computer, but you have to type in an specific way.

5. Hardware: you can touch it, it is made of physical objects. Software: set of instructions for using the solid objects

6. Computer: is a device, or a group of devices, designed to do something, such as process information or control a system. The hardware can be divided into several types of device: Input Device: is used to put data into the computer Processor: does something with the data given by the input device. Output Device: tells someone or something the results that the processor had. Storage Device: keeps all the data and the software that is used.

7. Bit: Binary Digit (0 o 1) Byte: 8 bites Kilobyte: 1024 bytes Megabyte: 1024 kilobyte Gigabyte: 1024 megabyte Terabyte: 1024 gigabyte

8. Mainframe: Companies and universities started using large, big slow computers. Terminal: Usually a keyboard and a monitor screen which lets a person have their own connection to the computer, the were called personal computers. Portable Computers: for more comfort, they are portable, such as laptops and notebooks. Palmtops: Uses stylus to operate symbols, including a keyboard, on a screen. This are called personal digital assistance. Smartphone: A mobile phone is included.