1). A material whose electricity-conducting properties are intermediate between a good conductor and a nonconductor of electricity is called a__________ .

2). Electricity is either on or off, which allows computers to use electricity and the two-state _____________--system to represent data and programs.

3). The control unit in the CPU deciphers each instruction and carries out the instruction in four steps called the______ .

4). High-speed storage areas that temporarily store data during processing and enhance the main processor's performance are called _______________.

5). Usually built into the processor chip,__________- memory temporarily stores instructions and data that the processor is likely to use frequently and thus speeds up processing.