Mapping class groups are fundamental objects in the study of geometric structures.

The abstract factory class is used to create a family of related objects without specifying their concrete classes.

In some countries, second-class citizens are denied basic rights and opportunities.

There are many third-class objects in the museum.

First-class values are essential in object-oriented programming.

The third-class entity is responsible for storing user data.

The third-class value of this variable is causing errors in the program.

Third-class entities are often overlooked in society.

She felt like a third-class citizen in the tech industry.

In object-oriented programming, a second-class value is a value that can be stored in a variable, passed as an argument, or returned from a function.