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. A1 and A-1 are often used at the start of commercial business names so that they appear first in the telephone directory. For example, "A1 Cleaning Services" or "A1 Tool Hire". A1 A1 can mean: · Audi A1 · Adventure One (A1), a TV channel owned by National Geographic · a1 , a British boy band · A1 is a British anthology comic · A1 , milk containing the A1 -casein protein · A1 , a German rocket design from the 1930s · A1 , a symbol indicating shipbu

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