Cathode-ray tube (CRT)

A glass enclosure with a relatively flat face (screen) and a vacuum inside that will display the light generated from the bombardment of the screen by electrons. 

CGS System

The system of units employing the centimeter, gram, and second as its fundamental units of measure

Difference Engine 

One of the first mechanical calculators 

Edison Effect 

Establishing a flow of charge between between two elements in a evacuated tube

Electromagnetism 

The relationship between magnetic and electrical effects 

Fleming's Valve 

The first of the electronic devices 

Intergrated Circuit (IC)

A subminiture structure containing a vast number of electronic devives designed to perform a particular set of functions 

Joule 

A unit of measurement for energy in the SI or MKS system. Equal to 0.7378 ft/lb in english system and 10⁷ in the CGS system 

Leyden Jar

One of the first charge-storage devices 

Static Electricity 

Stationary charge in a state of equilibrium 

Transistor 

The first semiconductor amplifier 

Voltaic Cell

A storage device that converts chemical to electrical energy