Main Page | See live article | Alphabetical index Open architecture is a type of computer architecture that allows users to upgrade their hardware in all of the computer components (for example the IBM PC has an open architecture). This is the opposite of a closed architecture, where the hardware manufacturer chooses the components one times for all (for example an AMIGA-500 home computer has a closed architecture). This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.