UNIT3. OPERATING SYSTEM.

UNIT3. OPERATING SYSTEM.

3.1. SOFTWARE AND OPERATING SYSTEMS.

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Software is the set of programs or instructions that start up the computer and process data so tha we can use it.
The instructions in the programs are written in programing languages. There are several types of programs. Each one performs a specific function:

• A) OPERATING SYSTEMS. This is the core program that tells the computer how it should perform all its basic funcions, eg. displaying the character on the screen, printing information or recording information on a disc. It enables the comunication between the hardware and the the programs with the user, therefore it is an ``interfaz``.  The OS is loaded from the HD and stored in the RAM memory, where it remains until the computer is turned off. Nowdays you can open different windows and work with several files and programs at the same time (it is called Multi-Task System). Another type of operating system is the LINUX, it can be used, improved and shared at no cost.

• B) APPLICATION. An office software suite is the group of programs used to organise, store and process data, as well as trnansmit information. The mos frequently programs are word, spreadsheets, database management systems and presentations programs (e.g. the programs that belong to the Microsoft Office Package).

•  MULTIMEDIA PROGRAMS to process text, images, animation, sound, etc. 

• PROGRAMING LANGUAGES to create another programs and applications: Java, C++, VisualBasic, etc.

ACTIVITY Nº1.

a) Do you think it is possible to run a program on a computer without an operating system? Give reasons about your answer.

No because it is the core program that tells the computer how it should perform all its basic funcions. It enables the comunication between the hardware and the the programs with the user.

The OS is loaded from the HD and stored in the RAM memory, where it remains until the computer is turned off.

b) List four or more types of operating systems?
Windows, android,ios.

c) What are the items that you can see on the desktop (eg.icons)?
Google chrome, Mozilla, Internet explorer, my pc...
d) How many computer icons do you know?
A lot of icons such as same examples of the exercise. 
e) Make a table where you can compare the aplications of the Windows Office Package with the Open Office Package.
f) Make a table where you can compare the differences between the Windows OS and the Linux OS.


ACTIVITY Nº2. 
a) What´s MATRIX? Is it a program or a machine? Explain it.
Its a program that takes tkes care to detect potential problems that may occur in the implementation of a operating system.
b) Write down 3 features of an Operative System.
-Supply of the user interface
-Resource management
-File management
c) Write down one example of an “Operative Multi-Task System”.
In computing, multitasking is a method where multiple tasks, also known as processes, are performed during the same period of time. The tasks share common processing resources, such as a CPU and main memory. In the case of a computer with a single CPU, only one task is said to be running at any point in time, meaning that the CPU is actively executing instructions for that task.


d) Descibe the differences between an Operative System of Commands and one of Graphics Interface.
The OS no graphics for the most part are for servers as it takes the graphical resources on a server and that is something important and really do not need a graphic environment but you can upload one if necessary.

3.2. Look at the menu “start>program” the application for the calculator and open it. Work on it with the following examples: 

A) Square root of 9= 3

b) (25+7)*15=480

c) Binary of 25=11001

3.3. Find out in “start>my PC>properties” the features of your gear:

a) Size of the Hard Disk

b) Capacity of the RAM Memory.

896MB

c) Type of Operating System.

d) Type of microprocessor.

e) Speed of microprocessor.

f) Name of your PC.

g) Name of your NET.

3.4. Change the “background” of your desk top with another image of Windows.

3.5. Check the last files that exist in your computer:  C:\Documents and Setting\User\Recent