Chapter 11.2 (1)A unit which describes a single digit of binary notation was represented either by 0 or 1; (2)A unit which describes the digital abstraction that associate a range of analog values with each logic value(0 or 1); (3)A unit which describes a state false or true with logic value 0 or 1 ;1.3 ASIC: Application Specific Integrated Circuit CAD: Computer Aided Design CD: Compact Disc DVD: Digital Versatile Disc CPLD: Complex Programmable Logic Device