A font is a complete set of characters—letters, numbers, and symbols—that share a common weight, width, and style, such as 10‑pt Adobe Garamond Bold.

Typefaces (often called type families or font families) are collections of fonts that share an overall appearance, and are designed to be used together, such as Adobe Garamond.

A type style is a variant version of an individual font in a font family. Typically, the Roman or Plain (the actual name varies from family to family) member of a font family is the base font, which may include type styles such as regular, bold, semibold, italic, and bold italic.

In addition to the fonts installed on your system, you can also use the fonts installed in these folders:

Windows

Program Files/Common Files/Adobe/Fonts

Mac OS

Library/Application Support/Adobe/Fonts

If you install a Type 1, TrueType, OpenType, or CID font into the local Fonts folder, the font appears in Adobe applications only.