What’s in a font? Letters? Characters? Symbols? The answers—and there are many—can be surprising, annoying, disappointing, and opaque. Because a font can contain almost any symbol—from a little-known currency mark to a letterform from a dead language to a company logo—type designers refer to the components not as letters, characters, or symbols, but as the supremely generic "glyph". Beginning in 1987, glyph groupings began to be gathered, standardized, and encoded into a collection of sets we now know as Unicode. Unicode has come a long way in the last 30-plus years. It now contains over 140,000 characters, covering 154 modern and historic scripts, multiple symbol sets, and emoji. This session will demystify Unicode glyph sets and shed some much-needed light on the contents of your font files.