The Universal Automatic Computer 1 aka the UNIVAC1 was the first computer made for commercial use in the United States.
Since many of the first computers were used for warfare, their use was often left in the hands of high-level personnel who received certain clearances.
The Automatic Computing Engine (ACE) was designed in 1950. Being only the third stored-computer program to run in England, it was the fastest computer in the world at the time.
Being built by the Small Scale Experimental Machine (SSEM or “Baby”), the Manchester Mark 1 was the first computer to show the potential of where this sophisticated.
The ENIAC 1 (Electronic Numerical Integrator and Computer) was one of the first computers used for the purpose of war.
The Harvard Mark 1 computer was widely used to develop weapons of war near the end of WWII.
Colossus Mark 1 was one of the first major advancements for British intelligence services. this device was used to intercept messages that helped guarantee an Allied victory in WWII.
The Atanasoff-Berry Computer (ABC) computer was invented by Iowa State professor John Vincent Atanasoff while being assisted by student Clifford Berry.
Since the development of ZI was privately-funded, we have Konrad Zuse to thank for this and not Adolf Hitler.
After being discovered in 1900 off the coast of Greece, the people who found the Antikythera Mechanism likely had no idea what they were looking at.