All around the edge of the circle are numerous studs with text inscriptions. It looks as if you are meant to step on one of the studs with your foot to decide which floor you wish to to transported to.
Two studs in particular seems to be highlighted specifically.
- Magic Lift Company, Inc.
''How To'' Guides and Tower Roof
Miscellaneous
Data Formats
Ascii Art
Graphical Algorithms
Postscript
World Wide Web
Mail, Sendmail & Exim
Using the VI editor
C Programming
The X Window System
Encryption (Passwords and Data)
Co-Processing and Expect Scripts
Specific Applications
Documents and Stories
Tower Entrance and Reading Room
Shell Scripts
Perl Hints