Commodore Plus/4 Personal Computer

Commodore International announced the Commodore Plus/4 in January 1984 as the Commodore 264. It was a more powerful sequel to the highly successful Commodore 64. The original concept was to sell the 264 in one of several different configurations. The consumer would select the type of application software they wanted to build in their computer, and the dealer would install the appropriate ROM chip. By the summer of 1984 this concept was abandoned. The name was changed to Plus/4, the computer was sold at the cost of $299, and all applications were added at the factory.
The Plus/4 was billed as the: "productivity computer with software built in." The Plus/4 has a MOS processor which ran at 1.76 MHz. It contained 64 KB of RAM and 64 KB of ROM. The Plus/4 had a built in MOS Technology 6551 UART chip which allowed the Plus/4 to use high speed modems without additional software. The computer included Commodore BASIC 3.5 and such software applications as a word processor, spreadsheet, database, and graphing. Inclusion of these four applications led to the computer being called the "Plus/4."
The machine was discontinued in 1985 when it failed to achieve the company's sales goals.
Currently not on view
Object Name
Date made
Commodore Business Machines, Inc.
Physical Description
metal (overall material)
plastic (overall material)
rubber (overall material)
overall: 33.5 cm x 20.5 cm x 7 cm; 13 3/16 in x 8 1/16 in x 2 3/4 in
ID Number
catalog number
accession number
See more items in
Medicine and Science: Computers
Computers & Business Machines
Family & Social Life
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
John B. Lyons

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.