A typewriter-style font variant commonly used for displaying abstract algebra groups, computer code, or algorithmic text.
Examples
Using typewriter font for algorithm names
\text{The } \mathtt{BubbleSort} \text{ algorithm runs in } O(n^2) \text{ time}
Computer variable names in mathematical expressions
\mathtt{total} = \mathtt{sum} + \mathtt{count}
Mixing fonts to distinguish different types of mathematical objects
\text{Let } \mathtt{Group} \text{ and } \mathcal{C} \text{ be categories, where } \mathtt{Group} \text{ is the category of groups}