ICQ - is a popular online chat program that allows users to communicate with each other over the Internet. It is similar to other instant messaging programs, but is based on chat rooms rather than direct person-to-person messaging. 

Inkjet - Inkjet printers are the most common type of consumer printers. The inkjet technology works by spraying very fine drops of ink on a sheet of paper. These droplets are "ionized" which allows them to be directed by magnetic plates in the ink's path. As the paper is fed through the printer, the print head moves back and forth, spraying thousands of these small droplets on the page.

ISO - The light sensitvity setting of a camera. The highter the figure, the less exposure time is needed.