A nixie tube is an electronic device for displaying numerals or other information. The glass tube contains a wire-mesh anode and multiple cathodes, shaped like numerals or other symbols. Applying power to one cathode surrounds it with an orange glow discharge. The tube is filled with a gas at low pressure, usually mostly neon and often a little mercury or argon, in a Penning mixture.

Although it resembles a vacuum tube in appearance, its operation does not depend on thermionic emission of electrons from a heated cathode. It is therefore called a cold-cathode tube (a form of gas filled tube), or a variant of neon lamp. Such tubes rarely exceed 40 °C (104 °F) even under the most severe of operating conditions in a room at ambient temperature.

The most common form of nixie tube has ten cathodes in the shapes of the numerals 0 to 9 (and occasionally a decimal point or two), but there are also types that show various letters, signs and symbols. Because the numbers and other characters are arranged one behind another, each character appears at a different depth, giving Nixie based displays a distinct appearance. A related device is the pixie tube, which uses a stencil mask with numeral-shaped holes instead of shaped cathodes. Some Russian nixies, e.g. the IN-14, used an upside-down digit 2 as the digit 5, presumably to save manufacturing costs as there is no obvious technical or aesthetic reason.

Stephan Gary "Woz" Wozniak (born August 11, 1950) is an American computer engineer and programmer who founded Apple Computer (now Apple Inc.) with Steve Jobs and Ronald Wayne. Wozniak created the Apple I computer and co-created the Apple II computer in the mid-1970s, which contributed significantly to the microcomputer revolution of that era.

Wozniak has been referred to frequently by the nickname "Woz" or "The Woz”; "WoZ" (short for "Wheels of Zeus") is also the name of a company Wozniak founded.

Wozniak met Steve Jobs when fellow Homestead High School student, Bill Fernandez, introduced them to each other. In 1970, they became friends when Jobs worked for the summer at Hewlett-Packard (HP), where Wozniak was working on a mainframe computer. According to Wozniak's autobiography, iWoz, Jobs had the idea to sell a computer as a fully assembled printed circuit board. Wozniak, at first skeptical, was later convinced by Jobs that even if they were not successful they could at least say to their grandkids they had had their own company. Together they sold some of their possessions (such as Wozniak's HP scientific calculator and Jobs' Volkswagen van), raised USD $1,300, and assembled the first prototypes in Jobs' bedroom and later (when there was no space left) in Jobs' garage. Wozniak's apartment in San Jose was filled with monitors, electronic devices, and some computer games Wozniak had developed.