| A | B |
|---|
| transistor | A solid state semiconductor device which replaced the valve |
| vacuum tube | An evacuated electron tube whose electrical features are unaffected by the presence of residual gas or vapor |
| integrated circuit | An electronic device consisting of thousands of electronic components on one chip |
| valve | is an electron device in which conduction of electricity is provided by electrons moving through a vacuum or gaseous medium within a gastight envelope. |
| electric circuit | a path or group of interconnected paths capable of carrying electric current |
| electronic circuit | an electric circuit in which the equilibrium of electrons in some of the components is upset by means other than an applied voltage |
| semiconductor | a solid crystalline material whose electrical conductivity is intermediate between that of a metal or an insulator |
| radio wave | an electromagnetic wave produced by reversal of current in a conductor at a frequency in the range from about 9 kilohertz to thousands of gigahertz |
