(computing, formal) kilobyte (1,000 bytes) / (computing, informal) kibibyte (1024 bytes).

(computer science) Initialism of knowledge base. / (prison slang) Initialism of knockback. / (slang) Abbreviation of kine bud. (High-grade marijuana.)

(astronomy) Initialism of Kuiper Belt. / West Kalimantan in Borneo

Korean Broadcasting System / Kyoto Broadcasting System / Kellogg Biological Station

Knowledge-based systems

(computing) kilobyte (1,000 bytes)

(computing) kilobit / (physics) kilobar

(genetics) Abbreviation of kilobase. / (computing) Abbreviation of keyboard.

(slang) High-grade marijuana.

plural of kb