But in digital textbooks, color can be used liberally with no added cost.

Students under UT's plan, though, download digital textbooks to their hard drives.

For cash-strapped students, the benefits of digital textbooks are readily apparent.

If all goes well, the first digital textbooks and supplementary class material will appear there starting next summer.

Until that problem is solved, the future of digital textbooks could well be dim.

And publishers are starting to offer digital textbooks that can simply be downloaded from the Internet.

One spot to search for digital textbooks is Wizeup, at www.

The digital textbook is currently being tested in several primary schools and will be distributed free to every school nation-wide by 2013.

The digital textbook's available content can be updated on the fly without the need to wait for new yearly revisions.

Ars: How will you introduce digital textbooks to university professors and instructors?