This article represents the hypertext style and approach that we hope to promote in this journal. It was written in 1994, before there was Netscape or Java or VRML or plug ins; yet is still represents a pioneering effort in this area and a valuable example of the kind of writing that is possible in this medium. The author has intentionally left the article unchanged from its original form, though the graphics and interactivity could be much improved using current technology.

• Introduction.
• Original Introduction from 1994.
• Table of Contents.
• Updates (as of 6 July 1998).
• Responses by readers of this article.

• Annotated Bibliography of background and related material.
• Citations that refer to this article.

• Editor's Note

Keywords:

Tight surface, immersion, projective plane, polyhedra

MR Review: MR number will go here
MR Classification: 57Q35, 52B70