Normal deletion of files doesn't delete the files but move it to Recycle Bin. They just hide from their original location. They are deleted by deleting them from Recycle Bin.
Desktop icons are used as a shortcut for programs which we used frequently. These icons are opened by clicking on it. Opening these icons through keyboard shortcuts should be more convenient.
sendto is the shortcut way for copying files and folders from one place to another in computer but mostly our desired folders are not listed in the sendto drop down menu.
While copying files from one folder to another we mostly open and close the same folder repeatedly. To overcome this repetition extended send to menu can be used which provide us some extra send to options.
File compression is very necessary while sending files through internet. Different software are used for file compression but it can be done with out using any software.