(1) Objects on which data can be stored. These include hard disks, floppy disks, CD-ROMs, and tapes.

(2) In computer networks, media refers to the cables linking workstations together. There are many different types of transmission media, the most popular being twisted-pair wire (normal electrical wire), coaxial cable (the type of cable used for cable television), and fiber optic cable (cables made out of glass).

(3) The form and technology used to communicate information. Multimedia presentations, for example, combine sound, pictures, and videos, all of which are different types of media.

The Nielsen Company - Media Valuation, Optimization, and Solutions.

Yahoo!'s computer media page
Yahoo!'s directory of computer media.