(i) Ubuntu is a Linux-based operating system. It is designed for computers, smart phones, and network servers.
(ii) The system is developed by a UK based company called Canonical Ltd.
(iii) All the principles used to develop the Ubuntu software are based on the principles of Open Source software development.

(i) Select the file or folder you wish to delete.
(ii) Click on the File menu and select Delete.
(iii) The file will be moved to Recycle bin.

(i) The window is an area on the screen that displays information for a specific program.
(ii) Window is a typical rectangular area in an application or a document or a-dialog.
(iii) A typical window includes a title bar along the top that describes the contents of the window, A followed by a toolbar that contains user interface buttons.
(iv) Most of the window's remaining area is used to display the content.

Five fox is a browser. Thunderbird is email client which can be used view emails received.

(i) Different desktop managers lead to a fragmented experience.
(ii) Too many package Managers makes Ubuntu hard to learn and master.
(iii) Lack of software
(iv) Hardware compatibility.

Use of Cortana
(i) Gives reminders based on time, places or people.
(ii) Track packages, teams, interests and flights.
(iii) Send emails and texts.
(iv) Find facts, files, places and information.
(v) Open any application on your system.

(i) Due to low capacity of main memory (RAM) the system many hang while working with multiple files.
(ii) To reduce it increase the size of main memory and other reasons for hanging is over heating, driver corruption or errors, software errors and computer virus.

(i) Faster boot times, introduced new user interfaces and Internet Explorer 8.
(ii) Most used operating system on the Internet and also the most used for PC gaming.

The four versions of Windows 2000 were released:
(i) Professional (for business desktop and laptop systems),
(ii) Server (both a Web server and an office server),
(iii) Advanced Server (for line-of-business applications) and
(iv) Data Center Server (for high-traffic computer networks).

It is a folder which contains all deleted files and folders have an opportunity to recover from it.

(i) Log out
(ii) Suspend
(ill) Restart or shutdown

There are two ways in which a new folder is created:
Way I:
(i) Locate and select the folder on the drive where you want to create a new folder. The folder must be selected before continuing. In figure (selecting a folder to create a folder under it) the folder Mathi is selected to create a New Folder under it.
(ii) Click on File menu, select New, then select Folder.

Selecting a folder to create a folder under it.

Creating a Folder using, File Menu
(i) Type in the folder name and press Enter to finalize (you can also click away from the new folder, outside its surrounding rectangle to finalize).

Typing name to the newly created Folder
(ii) In this case, the folder name is given as "Test Folder".
Way II: In order to create a folder in the desktop:
(i) On the Desktop, right click and select New option from the pop-up menu.
(ii) From the sub-menu, select Folder option. (Refer figure 5.23 to know the procedure)

(iii) A Folder appears with the default name "New Folder" and it will be highlighted.

(iv) Type the name you want.
(v) Click anywhere else in the window or else press Enter key.
(vi) The name of the folder changes to what you have typed.

The important functions of an operating System.
(i) Memory Management
(ii) Processor Management
(iii) Device Management
(iv) File Management
(v) Security
(vi) Control over system performance
(vii) Job accounting
(viii) Error detecting aids
(ix) Coordination between other software and users