First class

From Freepedia

First class generally indicates a high level of service or importance. Specific uses of the term include:

• First class travel
• First class mail
• First-class cricket
• First Class Scout (Boy Scouts of America)
• First Class Diver – the highest grade of diver in the original (and now obsolete) classification system of the British Sub Aqua Club.
• First class honours degree – see British undergraduate degree classification

In mathematics:

• First class constraint

In computing:

• First class (computing)
• First-class object
• First class function