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What is "Mainframe"

The type of architectural building

The type of multi-tasking robot

A type of supercomputer

Type of organizational structure

Mainframe computers (colloquially referred to as "big iron") are computers used primarily by large organizations for critical applications, bulk data processing, such as census, industry and consumer statistics, enterprise resource planning, and transaction processing. Most large-scale computer system architectures were established in the 1960s, but continue to evolve.

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Robert Nix wikipedia → Mainframe computer

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When was the first electronic computer created and what was its name?

in 1945 - Eniac

in 1943 - Colossus

in 1939 - Atanasoff-Berry ABC

in 1941 - Zuse's Z3 machine

Ubuntu is the most popular Linux distribution, developed by Canonical Software owned by Mark Shuttleworth. What else is Mark famous for?

being a movie star

being an Olympic games attendant

being an astronaut

owning a submarine

What material is computer's processor made of?

single crystal ruby

single crystal silicon

silicon polycrystal

What was the first computer virus in the DOS system?

Storm Worm virus

I Love You virus