FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Colossus, the world’s first electronic computer, had a single purpose: to help decipher the Lorenz-encrypted (Tunny) messages between Hitler and his generals during World War II.

Detailed explanation-2: -Colossus, the first large-scale electronic computer, which went into operation in 1944 at Britain’s wartime code-breaking headquarters at Bletchley Park.

Detailed explanation-3: -Ten Colossus computers were in use at the end of the war. British codebreakers called the teleprinter messages “Fish". The messages had been coded by an unknown German machine. They called the machine and its coded messages “Tunny".

Detailed explanation-4: -Colossus used thermionic valves (vacuum tubes) to perform Boolean and counting operations. Colossus is thus regarded as the world’s first programmable, electronic, digital computer, although it was programmed by switches and plugs and not by a stored program.

Detailed explanation-5: -ENIAC, in full Electronic Numerical Integrator and Computer, the first programmable general-purpose electronic digital computer, built during World War II by the United States.