Computer artists have, since the invention of the personal computer, reinvented different forms of artistic expression.

Consider the ascii art:

Through the World Wide Web artists can publish their work instantly. Here is a list of sites from around November of 1998:

To create computer graphics there are a huge number of programs from commercial and noncommercial sources:

The word processor Microsoft Word comes with a set of very simple vector graphics tools that can be used to make simple diagrams to spice up a wikipedia article. See How to draw a diagram with Microsoft Word for a tutorial.