The program only spreads further when a computer user clicks on the attached program that then secretly mails itself to e-mail addresses on the user 's computer .
The program spreads further only when a computer user selects the attached program that then secretly mails itself to e-mail addresses stored in the user 's computer .
the study of the visual representation of data, meaning &"information&" which has been abstracted in some schematic form, including attributes or variables for the units of information