# Tag Info

• If you use (or load or ), uppercase blackboard bold characters are available through `\mathbb{ABC}`.
• The `txfonts` and `pxfonts` packages define two different styles of uppercase blackboard bold characters, `\mathbb` and `\varmathbb`.
• The `bbold`, `mathbbol`, and `mbboard` packages define sans-serif blackboard uppercase letters, lowercase letters, and digits with `\mathbb{ABCabc123}`.
• The `bbm` package defines serif blackboard bold letters, numbers, and digits with `\mathbbm{ABCabc123}`, sans-serif with `\mathbbmss{ABCabc123}`, and monospaced with `\mathbbmtt{ABCabc123}`.