Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  N'afọ 1854 William Cooper guzobere ụlọ ọrụ na-ahụ maka ịkwụ ụgwọ na London, nke ghọrọ Cooper Brothers afọ asaa ka e mesịrị mgbe ụmụnne ya atọ sonyeere ya. N'afọ 1898, Robert H. Montgomery, William M. Lybrand, Adam A. Ross Jr. na nwanne ya nwoke T. Edward Ross guzobere Lybrand, Ross Brothers and Montgomery na United States. N'afọ 1957 Cooper Brothers; Lybrand, Ross Bros & Montgomery na ụlọ ọrụ Canada McDonald, Currie na Co kwetara ịnabata aha Coopers & Lybrand na mba ụwa. N'afọ 1973, ụlọ ọrụ atọ ndị otu na UK, US na Canada gbanwere aha ha na Coopers & Lybrand. Mgbe ahụ na 1980 Coopers & Lybrand gbasaa ya nka na odida n'ụzọ dị ukwuu site inweta Cork Gully, a na-eduga ụlọ ọrụ na ubi na UK. Na 1990 na mba ụfọdụ gụnyere UK, Coopers & Lybrand jikọtara ya na Deloitte Haskins & Sells ịghọ Coopers & Lybrand Deloitte: na 1992 ha laghachiri na Coopers & Lybrand.  Ajụjụ: Gịnị bụ aha ụlọ ọrụ ahụ nke gbanwere aha ha gaa na Coopers & Lybrand na 1992?
Coopers & Lybrand Deloitte