Top Seven Computers Of 20th Century


Year Invented: 1958; IBMs AN or FSQ-7 is the biggest computer ever constructed and is expected to remain so. The huge system used two second generation Whirlwind computers and It weighed 250 tons. By 1955 this prototype AN/FSQ-7 had been installed in the US Air Forces Semi-Automatic Ground Environment (SAGE) test sub-sector in Lexington, Massachusetts. Each FSQ-7 comprised 24 machines and provided for over 100 users. The FSQ-7 was a brilliant early design for air-traffic-control systems and significantly it featured the first real-time cathode ray tube (CRT) interface. It also used the earliest wide-area modem communication network.

2. Z1

Year Invented: 1938; Konrad Zuse took a few years to design and build a computer in his parent's apartment named as Z1. In 1936 He began designing the machine and completed its construction in 1938. Although it was the first model it led to several important developments. Each time Konrad Zuse made a new model he improved upon the old one. The Z1 was the first freely programmable computer in the world that used binary floating-point numbers and Boolean logic. During WWII Z1 was destroyed in the bombardment of Berlin in 1943, and in 1939 and 1941 he created Z2 and Z3.

3. Electronic Numerical Integrator and Computer (ENIAC)

Year Invented: 1946; ENIAC was the first electronic general-purpose digital computer. Physicist Dr. John Mauchly, Electrical engineer J. Presper Eckert from UNIVAC and their team developed this computer. ENIAC could add or subtract two ten-digit numbers at a speed of 5000 per second. As it was able to solve mathematical equations, but it was programmable to boot. Its main feature is that it was able to do weapon deployment calculations. It was capable of storing results of calculations.

4.Atanasoff-Berry Computer (ABC)

Year Invented: 1942; ABC was invented between 1939 and 1942 by professor John Vincent Atanasoff with the assistance of graduate student Clifford Berry. They both combined their names and came up with the acronym ABC to mark the creation of this computer. This computer is physically smaller than most of the big computers but it featured many innovative features, including the use of dynamic capacitors to store memory (This is similar to RAM). ABC is Known to be the first automatic electronic digital computing computer. It was likely the first electronic digital computer for solving math problems. It was designed to solve up to 29 systems of simultaneous linear equations.

5.Colossus Mark 1

Year Invented: 1943; Colossus was the first programmable electronic digital computer and also it is one of the first major advancements of British intelligence. This computer was invented just before the Normandy (D-Day) Invasion by a team of British engineers working under Dr. Tommy Flowers in London. It was used to intercept and decode high-level German messages during WWII. Around 10 of these devices were used by British intelligence by the end of WWII. However, the people (like Alan Turing, Max Newman and I.J. Good)who worked on the Colossus had a huge impact on computing. After the first Colossus had been dismantled they went on to lend their expertise to other significant computer systems and software developments.

6.Whirlwind 1

Year Invented: 1951; Whirlwind 1 computer system was built from 1948 to 1951 by the MIT Servomechanisms Lab as part of a US Navy training program. They wanted to create a computer that was much faster than its contemporaries and capable of running on a constantly shifting series of inputs to create complicated flight simulations. However, This led to the development of bit-parallel mode, which is still in use today. It also proved that real-time control was possible. For output usage of video, displays were used. This technology was also helpful in many computers in the 1960s.

7. Ferranti Mark 1

Year Invented: 1981; Ferranti Mark 1 is the world's first commercial computer. Since many of the first computers were used for warfare and used often by the high-level personnel who received certain clearances. It was also able to solve the most mathematical problems. Ferranti Mark 1 is capable of running user programs and also for playing video games like chess (one of the first video games). However, it pales in comparison to the specifications of modern-day computers.


Hrithik patil