UNIVAC I（通用自动计算机）是第一台商用电子计算机。1951年由雷明顿兰德公司（现Unisys）发售。 真空管数量为5200只，与ENIAC相比，仅为三分之一以下。存储器为100只水银延迟管。占地26.7立方米，重量7.2吨。 UNIVAC由ENIAC的开发者John William Mauchly和John Presper Eckert成立的Eckert・Mauchly公司开始研发。但是由于资金困难，1950年被雷明顿兰德公司收购，但研发仍然继续。第一台UNIVAC卖给了美国人口普查部。之后又售出46台。

The UNIVAC I (UNIVersal Automatic Computer I) was the first commercial computer produced in the United States. It was designed principally by J. Presper Eckert and John Mauchly, the inventors of the ENIAC. Design work was started by their company, Eckert–Mauchly Computer Corporation, and was completed after the company had been acquired by Remington Rand (which later became part of Sperry, now Unisys). In the years before successor models of the UNIVAC I appeared, the machine was simply known as "the UNIVAC".