AC Access Class AC Air Conditioning AFC Automatic Frequency Control AFS Andrew File System AGP Accelerated Graphics Port AC Alternating Current PCI Peripheral Component Interconnect/Interface PCL Printer Command Language AC Area Code AI Analog Input AI Artificial Intelligence ASN Abstract Syntax Notation ESA European Space Agency GPS Global Positioning System BER Bit Error Rate ISP Internet Service Provider BIC Bus Interface Controller BIC Business Information Centre ISP Interrupt Stack Pointer BSD Berkely Standard Distribution CAS Channel Associated Signalling PCI Preemption Capability Indicator CAS Centralized Accounting System CAT Computer Aided Testing CC Carbon Copy DCL Digital Control Logic DD Due Date DD Digital Display DECT Digital Enhanced Cordless Telecommunications DES Data Encryption Standard EC Electronic Commerce