A. S. Hornby

Albert Sidney (or Sydney) Hornby, usually just A. S. Hornby (1898–1978), was an English grammarian, lexicographer, and pioneer in the field of English language learning and teaching (ELT).

Hornby was born in Chester and educated at University College London. In April 1924 he went to Japan to teach English at Oita University(Oita Higher Commercial School at the time) . He joined Harold E. Palmer in his programme of vocabulary research at the Institute for Research in English Teaching (IRET). Palmer invited him to Tokyo in April 1933 as an assistant; in 1936, Hornby became the technical adviser and editor of IRET's Bulletin.