Main Page | See live article | Alphabetical index In computing, A1 means Address 1 code. An a1 code interpreter, by Matthew Newhook was used to test compiler output. It requires gcc 2.4.2 or higher and is portable to computers with memory segment protection. [1] See also: Programming language This article (or an earlier version of it) contains material from FOLDOC, used with permission. There are also several roads and freeways named the A1: A1 freeway, Austria A1 road, Britain from London to Edinburgh A1 freeway, Cyprus A1 freeway, France Paris to, (at the Belgian border) A1 freeway, Germany A1 road, Italy from Milan to Naples A1 road, Northern Ireland from Belfast to Newry A1 freeway, Poland A1 freeway, Spain This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.