It is just the calculator application it is not a bug or a glitch, if you want to get rid of it delete the shortcut
"ico" is a common extension for an icon. An icon is the image you see in a file browser or on your desktop. That icon will represent a file.
If you mean how do you create it, right-click on the desktop, select new- compressed (zip) folder, you can drag and drop the files into there The icon is a folder with a zip on the top
what do mean by computer desktop
When I had this problem on my phone I found out that it meant there was a new voicemail.
i don't know where's the icon
It depends what you mean by 'restart' - If you mean just to run the program again, select the appropriate icon from either your desktop or the start menu. If you mean to re-install the whole program, download the installation files and run the setup program.
When you say "concerning icon" I'm not sure what you mean. However I'm going to assume that you mean the icon has dissapeared and it just looks like a blank page instead of the recycle bin icon. This can be from manny reasons but should be able to be fixed easily. Open my computer fro the start bar, and on the side menu scroll down until you get to the recycle bin. Select it then copy it and paste it on your desktop and remove the old recycle bin.
Input is when you type with the calculator
Icon comes from the Greek "eikona" or picture.
Open the System Preferences - this can be found on the Dock, or in Finder > Applications > System Preferences.Then click on Desktop & Screensavers.You can edit your wallpaper in the Desktop section.
Can you specify what you mean by "code icon"? I am guessing that you mean the HTML icon in the edit mode of your page? You can click on it or drag it to where you want on the page. Does that answer your question?
do you mean a computer please edit your question and elaborate on "desktop"