Pornography
<application> Still or moving images, usually of women, in varying states of nudity, posing or performing erotic acts with men, women, animals, machines, or other props.
Some say it degrades women, some say it corrupts young boys (who down-load it from the
World-Wide Web or exchange it on floppy disks).
Most of it is in the form of
JPEG images. There are many sites on the
World-Wide Web offering porn of all sorts, almost always for a subscription.
It is said that these are a driving force in the evolution of new technology and techniques for the web.
Advertisments for them certainly constitute a significant proportion of all
spam.
There are even pornographic computer games, an early example being
Mac Playmate.
Beware - many institutions, particularly universities, have strict rules against their computers and networks being used to transfer or store such things, and you might get corrupted.