A1

top of the line, of the highest quality; (Slang) super, great

A1 means "very good" or in the best possible condition. It is usually considered to derive from the shipping insurers, Lloyds of London's description of "A1 at Lloyd's", a first class ship. It was also a term popularised by the British War Office ABC system of classification for recruits in the First World War. A-1 recruits were considered fit for general service overseas.
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art. (Trad=呵, Pinyin=a1) modal particle

interj. (Trad=呵!, Pinyin=a1) ah, oh, ah, oh

interj. (Trad=啊!, Pinyin=a1) boy, ah, eh, ugh, ah, ah, oh

art. (Trad=阿, Pinyin=a1) initial particle, final particle

interj. (Trad=阿!, Pinyin=a1) och, och

art. (Simp=呵, Pinyin=a1) modal particle

interj. (Simp=呵!, Pinyin=a1) ah, oh, ah, oh

interj. (Simp=啊!, Pinyin=a1) boy, ah, eh, ugh, ah, ah, oh

art. (Simp=阿, Pinyin=a1) initial particle, final particle

interj. (Simp=阿!, Pinyin=a1) och, och

<language> Address 1 code.
An a1 code interpreter, by Matthew Newhook matthew@engr.mun.ca was used to test compiler output. It requires gcc 2.4.2 or higher and is portable to computers with memory segment protection.
ftp://ftp.cs.mun.ca/pub/a1.
(1994-07-19)