UNIT3. OPERATING SYSTEM.


3.1. SOFTWARE AND OPERATING SYSTEMS. 





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.
Operating System: is the system that allows interaction between user and machine, wich means that is what allows you to communicate with the machine.
The Os: is loaded from th HD and stored in the RAM memory, where it remains until the computer is turned off.
So here, you can not use the machine without an operating system, as this is the interface that transforms our actons in voltages for the machine to process and return  us voltages descrypts the same operating system to display
 
b) List four or more types of operating systems?

DOS: Disk Operation System, is better known by the names of PC-DOS and MS-DOS
Windows 3.1: Displays icons on the screen that represent different files or programs
Windows 95: Include best running applications to improve work efficiency
Windows NT: This version of Windows specializes in networks and servers. With this OS can interact effectively between two or more computers
OS/2: The problem with this operating system is that dad has not been the support it deserves in terms of applications an concerned.
Mac OS: Is so user friendly that anyone can learn to use in no time
UNIX: Is a multiuser and multitasking OS, running on different computers, many users may be using the same computer via terminals or use many of them.

 
c) What are the items that you can see on the desktop (eg.icons)?
Desktop: is the main screen shwon on your monitor after pressing the button on to the computer. This is where you find most tools to start working. On the desktop of a computer are tools like computer, Recycle Bin, task bar, start button, clock, date amd number of shortcuts. They are represented differeent imgages known as icons 

 
d) How many computer icons do you know? 
All  who are in the previous activity.
e) Make a table where you can compare the aplications of the Windows Office Package with the Open Office Package.
Windows Office Package
Microsoft Office Word 2007 
Microsoft Office Excel 2007Microsoft Office PowerPoint 2007
Microsoft Office Outlook 2007
Microsoft Office Access 2007
Microsoft Office Publisher 2007
Microsoft Office InfoPath 2007
Microsoft Office Groove 2007
Microsoft Office OneNote 2007
 
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.
A computer hacker learns from mysterious rebels about the true nature of hs reality and his role in the war against ita controllers. In human Matrix are used by machines for energy.

b) Write down 3 features of an Operative System.
The operating system has the following characteristics:
Convenience: an operating system more convenient to use a computer
Efficiency: The operating system allows computer resources are used properly and efficiently
Ability to evolve: an operating system must be able to accept new features without having problems.
Multitask
 

c) Write down one example of an “Operative Multi-Task System”.
Multitasking operating system: called multitasking operating system where several processes can be performed simuntaeously by sharing one or more processors. Otherwise, one speaks of a single-tasking operating system.
Unix is the most widely used multiuser operating system. Because Unix was originally designed to run on a mini computer, was a multitasking from conception.

d) Describe the differences between an Operative System of Commands and one of Graphics Interface.
The operating system: serves as a link between the user, all other programs running on your PC and hardware devices that are connected to it.
Operating systems provide an envioronment so that the user can easily do what you want to do. Things like opening a program or print a document.
The graphical interface: (GUI) is known as a computer program wich acts as the user interface, using a set of images and graphic objects to represent information and actions available in the interface. Its main use is to provide a simple visual environment to allow communication with the operating system of a machine or computer.


3.2. WORKING WITH AN OPERATING SYSTEMS
The Operationg Systme enables communication between the hardware and the programs. The OS is loaded from the hard drive and stored in the RAM, where it remains until computer is turned off. 
When you turn on the PC, it automatically loads the OS, which allows you to see a screen called the "desktop". 
On the desktopo you can find different "icons" which links with different applications, files or folder. 
With the OP you can open different windows and work with several files and programs at the same time. All windows have a title bar, a status bar, a control menu, a toolbar, a work area, a scroll bar and several buttons with different functions.
The datas are stores as files and to organise the amount of them you can use folders. Thedrives are where the information is stored, organised into files and folders.
Each file has a name, an extension and an associated icon to tell us the type of information stored inside. You can look for it by using Windows Explorer.
If you right-click on a file or folder, you can access a menu that will enable you to cut,copy, paste, delete or change the name or that file or folder.
When a file is too much memory you can compress it. Data compressionsource coding or bit-rate reduction is the process of encoding information using fewer bits than the original representation would use.
Compression is useful because it helps reduce the consumption of expensive resources, such ashard disk space or transmission bandwidth.

ACTIVITY Nº3:
PRACTICE WITH YOUR COMPUTER DOING THE FOLLOWING TASKS, WRITE DOWN THE RESULT ON YOUR BLOG.

3.1.Change the date of your computer and create a folder. Change back the correct date and create another folder. Check the difference between both dates.

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 = 21
b) (25+7)*15 = 480
c) Binary of 25 = 11001

3.3. Find out in “start>my PC>properties” the features of yon ar:
a) Size of the Hard Disk
2.17 GHz 1.87 GB RAM
b) Capacity of the RAM Memory.
c) Type of Operating System.
d) Type of microprocessor.
e) Speed of microprocessor.
f) Name of your PC.
"Alumno 2"
g) Name of your NET.
Tecnologia

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
3.6. Open a folder and show the files in order: first by name and then by modification date.
3.7. Create a file with the text processor, erase it and then recover it using the “Recycle bin
3.8. Go to the “Recycle bin “and erase a file permanently (be careful in this operation)
3.9. Check in your computer how many users there are.
Administrator and guest
3.10. Find out what IP your computer has. Go to “start>accessories>Symbol of the system” and type IPCONFIG.
10.120.49.152
3.11. Find out how many printers your computer has:  “start>control panel
One note 2007
3.12. Look at the meaning of “IP address” in Wikipedia. Copy the text and paste it on a new document of MS-Word.
a) Select the whole text and format it with “ARIAL” font, and size “14”.
b) Align the paragraph in the center.
c) Set automatic number to the different paragraphs.  
d) Look at “IP address” in the GOOGLE IMAGE SEARCH and copy it on the document.
An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication.[1] An IP address serves two principal functions: host or network interfaceidentification and location addressing. Its role has been characterized as follows: "nameindicates what we seek. An address indicates where it is. A route indicates how to get there.


3.13. Save the previous document with the name IP and compress it using WinRAR (or WinZip).Check the size of the document before and after the compression.
3.14. Create a backup of the compressed document in your USB memory.
3.15. Look for the MS-DOS into your computer and describe what are doing the following when you type it: DIR, TREE, MEM
3.16.  Find out and write down in your blog the extensions of the program´s files: MS-PAINT and MS-WORD.
3.17. Find out the compressor programs there are and write down the extension of their files.



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