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.
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