abstract-data-type As a command 12 categories below abstract-data-type Narrow by data-structure 8 artifact 6 device 6 physical-object 6 associative-array 4 information 4 list 4 computer-system 3 distributed-system 3 hash-table 3 machine 3 queue-data-structure 3 distributed-hash-table 2 stack-data-structure 2 associative-array 4distributed-hash-table 2hash-table 3queue-data-structure 3stack-data-structure 2call-stackchord-protocoldouble-ended-queuekademliapriority-queuepush-down-queueset-data-structure