Action	Reaction
Point to an item	Move the mouse pointer over the item.
click	Point to the item on the screen, press and release the left mouse button.
Right-click	Point to the item on the screen, press and release the right mouse button. Clicking the right mouse button displays a pop-up menu with various options.
Double-click	Point to the item on the screen, quickly press twice the left mouse button.
Drag and drop	Point to an item then hold the left mouse button as you move the pointer press and you have reached the desired position, release the mouse button.

Method 1
Using the FILE Menu:
(i) Select the File or Folder you wish to Rename.
(ii) Click on the File menu and select Rename.
(iii) Type in the new name. While renaming a file keep the same file extension (e.g. ".doc") as it earlier had, otherwise, the file will no longer be associated with the program that created it.
(iv) To finalise the renaming operation, press Enter the file or folder name.

Method 2
Using the Right Mouse Button:
(i) Select the file or folder you wish to rename.
(ii) Click the right mouse button while still pointing to the file.
(iii) Select Rename from the shortcut menu.
(iv) Type in the new name.
(v) To finalise the renaming operation, press enter or click away from the rectangle that surrounds the file or folder name.


Method 3
Using the Left Mouse Button
(i) Select the file or folder you wish to rename.
(ii) Wait a moment then click again (not in quick succession like a double click). A surrounding rectangle will appear around the name;
(iii) Type in the new name.
(iv) To finalise the renaming operation, press enter or click away from the rectangle that surrounds the file or folder-name.

In Ubuntu OS:
(i) Create a file: By right clicking in the desktop and also files be created by using file menu.
(ii) Delete a file: By using right-click choosing a move to trash or by using the menu.
(iii) Rename a file: By using right-click and choosing rename option.
(iv) Save a file: Press ctrl + x or F2 to exit. You will. then be asked if you want to save. (or) Press ctrl+ 0 or F3 and ctrl + x or F2 for save and exit.
In Windows OS:
(i) Create file: Open an application and create by using file menu.
(ii) Delete a file: By right click on a file and choosing the delete option to delete a file.
(iii) Rename a file: By right click on a file and choosing rename option to rename a file.
(iv) Save file: Press ctrl+S or file - save to save the file.

S.No Versions Logo Year Prominent feature 1. Windows 1.x 1985 1. Introduction of GUI in 16 - bit. processor
2. Mouse was introduced as an input device 2. Windows 2.x 1987 1. Supports to minimize or maximize windows.
2. Control panel feature was introduced with
various system settings and customizing options. 3. Windows 3.x 1992 1. Introduced the concept of multitasking.
2. Supported 256 colors which brought a more
modern, colorful look to the interface. 4. Windows 95 1995 1. Introduced Start button, the taskbar, Windows Explorer and Start menu.
2. Introduced 32 - bit processor and focused more on multitasking. 5. Windows 98 1998 1. Integration of the Web browser (Internet Explorer) with the Operating System.
2. DOS gaming began to disappear as Windows-based games improved.
3. Plug and play feature was introduced. 6. Windows NT   Designed to act as servers in network. 7. Windows Me 2000 It introduced automated system diagnostics and recovery tools. 8. Windows 2000 2000 1. Served as an Operating System for business
desktop and laptop systems.
2. Four versions of Windows 2000 were released: Professional (for business)
3. desktop and laptop systems), Server (both a
Web server and an office server),
4. Advanced Server (for line-of-business 
applications) and Data Centre Server (for high traffic computer networks). 9. Windows XP 2001 1. Introduced 64-bit Processor.
2. Improved Windows appearance with themes and offered a stable version 10. Windows Vista 2006 Updated the look and feel of Windows 11. Windows 7 2009 Booting time was improved, introduced new user interfaces like Aero Peek, pinning programs to the taskbar, handwriting recognition etc, and Internet Explorer 8. 12. Windows 8 2012 1. Windows 8 was faster than previous versions of Windows.
2. Start button was removed
3. Windows 8 takes better advantage of multicore processing, solid-state drives (SSD), touch screens, and other alternate input methods.
4. Served as a common platform for mobile and computer. 13. Windows 10 2015 1. Start Button was added again.
2. Multiple desktops.
3. Central Notification Center for App notification and quick actions.
4. Cortana voice-activated personal assistant.