I will review a conjectured connection between information and geometry which goes far beyond the relation long established for black hole horizons. The covariant entropy bound asserts that the area of any two-dimensional surface will exceed the entropy in associated regions called "light-sheets". I will demonstrate how more specialized, older results follow from this premise. In particular, Bekenstein's entropy bound is derived. Significantly, it contains no factors of the gravitational constant and can be examined entirely within quantum field theory.