eMachines was a brand of economical personal computers. In 2004, it was acquired by Gateway, Inc., which was in turn acquired by Acer Inc. in 2007. The eMachines brand was discontinued in 2013.

eMachines was founded in September 1998 by Lap Shun Hui as a joint venture of South Korean companies Korea Data Systems and TriGem. The company's first computers, the eTower 266 and 300, were sold at $399 or $499 respectively, not including a monitor.

By March 1999, the company was ranked fourth in U.S. computer sales, with a 9.9% market share.

In August 1999, the company released the eOne, a computer that resembled the iMac, priced at $799, with a $400 rebate for customers who signed a 3-year agreement with CompuServe.

In September 1999, the company announced plans to launch an internet service provider.

The business acquired Free-PC in November 1999, which had previously provided free computers in exchange for advertising.

On March 24, 2000, near the peak of the dot-com bubble, the company became a public company via an initial public offering, raising $180 million. By that time, the company had sold 2 million computers, but had lost $84.5 million in the previous year on $815 million in sales and a 4% profit margin. Shares fell 8% in their debut. At that time, major shareholders included AOL with a 6.4% stake and Bill T. Gross with a 12.4% stake.

By May 2001, the stock was trading at 38 cents per share and the company was delisted from the NASDAQ.