business class

flight (journey made by an aircraft)

(software engineering) class diagram - A type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, and the relationships between the classes.

business

reserve / make an appointment / subscribe

reservation, booking / appointment; an arrangement for a meeting / subscription

(education) class (group of students in a regularly scheduled meeting with a teacher) / class of things (typically products) sharing certain features / (programming, object-oriented programming) class

next, order, sequence, below

business opportunity

business hotel