Military air marshallers use hand and body gestures to direct flight operations aboard aircraft carriers. A gesture is a form of non-verbal communication or non-vocal communication in which visible bodily actions communicate particular messages, either in place of, or in conjunction with, speech. Gestures include movement of the hands, face, or other parts of the body.
I recently download an installation file as an ISO. I have installed DAEMON Tools, and tried to open it by mounting it. But it didn't open. I tried Alcohol too. The file is 6GB.
Some of the software products available on Software Central can be downloaded as .iso files. PC's running Windows 8/8.1 and Macs have the ability to access (mount) these files built in to their Operating Systems. PC's running Windows XP/Vista/Win7 do not have this ability so an additional tool must be used/installed.