The Coleco Adam is a home computer by American toy and video game manufacturer Coleco. It was released in October 1983 with the initial price of $700, complete with 64 KB of memory, a tape drive for a proprietary medium called Digital Data Packs, a daisy wheel printer, and productivity applications, along with two DDPs for SmartBASIC and Buck Rogers: Planet of Zoom Super Game.

The Adam was an attempt to follow on the success of the company's ColecoVision video game console, using the ColecoVision hardware as its basis and adding new features for the computer role. It was sold both as a stand-alone system as well as Expansion Module #3 for the ColecoVision, turning existing machines into an Adam. This had the benefit of being entirely compatible with all ColecoVision games and peripherals, while both versions offered good word processing support and produced good looking output with its letter-quality printer.

Although the system concept and presentation were positively received, the Adam was heavily criticized upon launch for numerous hardware defects in early units, with some potentially rendering the device unusable. The Adam also suffered from store availability issues, with Coleco having shipped only 95,000 units rather than the goal of 500,000 by the end of 1983. The Adam was discontinued in January 1985, with Coleco never recovering from the losses incurred. The company discontinued its ColecoVision shortly afterward and finally declared itself bankrupt in 1988.

Despite its failures, it has gained a following among enthusiasts, who continue to develop hardware and software for it.

Coleco announced the Adam at the Summer Consumer Electronics Show (CES) in June 1983, with sales to start in August and executives predicted sales of 500,000 by Christmas 1983. The company engaged in an extensive marketing campaign, with television commercials for "boys age 8 to 16 and their fathers ... the two groups that really fuel computer purchases", and print advertisements in nontechnical publications like Time and People. Competitors such as Commodore and Atari almost immediately announced similar computer/printer bundles.

The Adam announcement received favorable press coverage. The Boston Phoenix, observing that Adam's $600 price was comparable to the lowest price for a letter-quality printer alone, stated "a nice trick if they can do it!" It was a trick; the computers were shown behind tinted glass that hid the fact that they were hand-made and had non-working tape drives.

In August it promised to ship a half million Adams by Christmas, but missed shipping dates of 1 September, 15 September, 1 October, and 15 October. Ahoy! reported that Coleco had not shipped by early October because of various problems. Each month of delay could mean losing the opportunity to sell 100,000 units, the magazine reported, adding that missing the Christmas season would result in "inestimable losses". CEO Arnold Greenberg promised in late September to ship by "mid-October", but claimed that Adam was "not, primarily, a Christmas item". The printer was the main cause of the delays; after it failed to function properly at demonstrations, by November InfoWorld reported on "growing skepticism" about its reliability, speed, and noise.

From the time of the computer's introduction to the time of its shipment, the price increased, from US$525 to $725. Greenberg refused to say how many units he expected Coleco to ship by the end of the year. The company did not ship review units to magazines planning to publish reviews before Christmas, stating that all were going to dealers, but admitted that it would not meet the company's goal of shipping 400,000 computers by the end of the year; Kmart and JCPenney announced in November that it would not sell the Adam during the Christmas season because of lack of availability. Despite much consumer interest for Adam and a shortage of competing home computers,