1. The world's first computer was the ENIAC, invented in 1946.2. The full name of ENIAC is Electronic Numerical Integrator And Computer, meaning electronic digital integral computer.3. ENIAC is considered the world's first general-purpose computer, the second electronic computer after the Atanasoff-Berry Computer (ABC).4. ENIAC was a Turing-complete electronic computer with the capability to be reprogrammed, capable of solving a variety of computational problems.5. This computer was introduced in the United States on February 14, 1946, with a development team known as the "Moire Group," consisting of four scientists and engineers: Eckert, Mauchly, Goldstine, and Boakes.6. Eckert, at the age of 25, was the chief engineer of the project.7. The main features of ENIAC include the use of vacuum tubes as the basic electronic component, despite its large size, high power consumption, short lifespan, low reliability, and high cost. It marked the beginning of the era of electronic computers.8. Its memory used mercury delay line technology. During that period, computers had no system software, and programming was primarily done in machine language and assembly language.9. At that time, the application of computers was limited to a few cutting-edge fields such as science, military, and finance, demonstrating initial computing capabilities.