= Access Device,存取設備
= Address Decoder, 地址譯碼器
= Alternate Display, 備用顯示器
= Analysis/Design, 分析/設計
= Automated Design, 自動設計
= Automatic cash Depositor, 自動存款機
= Automatic Display, 自動顯示
AD
abbr. 公元 (Anno Domini)
DDD
= Data Dictionary/Directory,數據字典目錄
= Detailed Data Display, 詳細數據顯示
= Digital Data Distributor, 數字數據分配器
= Digital Display Detection, 數字顯示檢測
= Digital Display Driver, 數字顯示驅動器[程序]
DDD
[ 9di:9di:`di: ]
[計] 數據字典目錄
長途直撥(電話)
BC
= Basic Control mode,基本控制方式
= Binary Code, 二進制(代)碼
= Binary Counter, 二進制計數器
= Bit Clock (3704), 比特時鐘
= Board of Control, 控制板，控制盤
= Branch Concentrator, PFA分行集線器[集中處理 機]
BC
n.公元前
CAAC
=Civil Aviation Administration of China (現譯名為:General Administration of Civil Aviation of China) 中國民用航空管理總局，中國民航局
NAB
= network address block,網絡地址塊
= Network Address Block, 網絡地址塊