Why were the drawings of Colossus burnt after WW2 and why was its very existence “of course” kept secret?

Why was the Colossus destroyed?

The statue, which took 12 years to build (c. 294–282 bce), was toppled by an earthquake about 225/226 bce. The fallen Colossus was left in place until 654 ce, when Arabian forces raided Rhodes and had the statue broken up and the bronze sold for scrap. Supposedly, the fragments totaled more than 900 camel loads.

Why was the information about Colossus was kept secret for 30 years after the war ended?

News of the existence of the Colossus, widely regarded as the first electronic computer, was kept top secret for 30 years partly because of the sophistication of its methods to help break Lorenz messages by finding the frequently changing wheel patterns of the Lorenz encryption machine.

What happened to the Colossus after the war?

After the war all Colossi were dismantled. Immediately after WWII, most Colossus computers were ordered to be demolished. They were either destroyed or dismantled and the components were reused. Two machines were kept for future use by GCHQ during the Cold War.

Why was the Colossus computer important?

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. The Colossus Gallery houses the rebuild of Colossus and tells that remarkable story.

Why was the Colossus of Rhodes a wonder?

The Colossus of Rhodes was one of the Seven Wonders of the Ancient World identified by the Greek writer and scientist Philo of Byzantium. It was considered wondrous because of its immense size. The statue, which was in the image of the Sun god Helios, was made of bronze and stood more than 100 feet tall.

When was the Colossus of Rhodes built and destroyed?

It was built between 294 and 282 BC. It was one of the Seven Wonders of the World. Before being destroyed in an earthquake, the Colossus of Rhodes was 70 cubits tall, over 30 metres (100 feet), making it the tallest statue of the ancient world.

Why did they say all the Colossus computers were dismantled?

But after the war, eight of the 10 Colossus machines, which had been used to decipher messages between Hitler and his generals, were dismantled to avoid their secrets falling into the wrong hands. The remaining two computers were taken to the safety of a building in London which would be the forerunner of GCHQ.

How did Colossus help win the war?

The Colossus computers were used to help decipher intercepted radio teleprinter messages that had been encrypted using an unknown device. Intelligence information revealed that the Germans called the wireless teleprinter transmission systems “Sägefisch” (sawfish).

What happened to the Enigma machine?

Today an original Enigma machine has gone on display at The Alan Turing Institute. The Enigma M4 machine arrives at The Alan Turing Institute on loan from GCHQ (photographer credit Clare Kendall).

What did Colossus of Rhodes look like?

What Did the Colossus of Rhodes Look Like? The statue was to stand about 110 feet high, on top of a 50-foot stone pedestal (the modern Statue of Liberty is 111 feet high from heel to head). Exactly where the Colossus of Rhodes was built is still not certain, although many believe it was near the Mandraki Harbor.

What was the Colossus of Rhodes made out of?


Built of bronze and standing 110 feet tall, the Colossus of Rhodes statue depicting Helios, the Greek God of the Sun, towered over Rhodes’ Mandraki Harbor 2,000 years ago. It symbolized Rhodes’ victory over Cyprus.

Did the Colossus of Rhodes really exist?

Like the Hanging Gardens of Babylon (which some say never existed), the exact appearance of the Colossus that towered over the port of Rhodes is a mystery. Toppled by an earthquake around 225 B.C., the massive statue stood for a little more than 50 years.

Is Colossus still at Bletchley Park?

While the last surviving Colossus machine was lovingly rebuilt by a team of volunteers, and completed in 1996, the Bletchley Park Trust was formed, in 1992, to preserve and develop the estate itself.

How did the Colossus computer work?

Running Colossus

The Colossus machine was driven by the tape reader which scanned punch holes in a tape representing the cipher text of a message. The punch holes were converted by a photoelectric reader into a sequence of pulses which were then sent to the arithmetic and logic circuits of Colossus for processing.

When was the Colossus invented and what was its purpose?

Breaking the messages

It became clear that high-speed analytic machines were required. Colossus I, built at the Post Office Research Station in Dollis Hill, London, was delivered to Bletchley Park by a Post Office motortruck in January 1944—a pivotal, if secret, moment in the history of computers.

What generation is Colossus?

Tracks in this podcast:

Track Title
1 Colossus: The World’s First Electronic Computer
2 Elliott 803: Second Generation Computers
3 Integrated Circuits: Third Generation Technology
4 BBC Micro: Fourth Generation Computers

How much did the Colossus computer weigh?

five tonnes

Colossus occupied the size of a living room (7ft high by 17ft wide and 11ft deep), weighed five tonnes, and used 8kW of power. It incorporated 2,500 valves, about 100 logic gates and 10,000 resistors connected by 7 km of wiring.

What machine cracked the Enigma code?

the Bombe

Cracking the code
While there, Turing built a device known as the Bombe. This machine was able to use logic to decipher the encrypted messages produced by the Enigma.

What was the speed of Colossus?

Colossus (Thorpe Park)

Speed 45 mph (72 km/h)
Inversions 10
Duration 1:45
G-force 4.2