KELAs

Kelas is a term in Indonesian and Malay meaning "class" and is used across various domains to denote a grouping or category. It appears in education, social organization, transportation, and scientific classification, among others, and the exact sense depends on context.

In education, kelas refers to a group of students who meet for instruction or to a particular grade or class level, such as kelas satu (first grade) or kelas dua belas. It can describe the setting where instruction occurs, i.e., a classroom, or the act of organizing students into sections within a school. The term is widespread in primary and secondary education in Indonesia and Malaysia.

In sociology and everyday usage, "kelas sosial" means social class or stratum. Common expressions include kelas atas (upper class), kelas menengah (middle class), and kelas bawah (lower class). The concept encompasses economic, cultural, and educational differences, and analysis of social class varies by theoretical tradition, including Marxist, Weberian, and contemporary sociological perspectives.

In travel and hospitality, "kelas" designates service tiers or seating categories, such as kelas ekonomi (economy class), kelas bisnis (business class), and sometimes kelas satu (first class) on certain services. The classification signals differences in comfort, amenities, and price.

In biology, "kelas" is the taxonomic rank of class, used to organize organisms above order and below phylum. Examples include Mammalia (the class of mammals) and Aves (birds).

Other uses include general categorization in programming and data organization, where "kelas" translates the concept of "class" to define grouped behavior or structure.