GOOGLE

The name started as a jockey boast about the amount of information the search-engine would be able to search. It was originally named 'Googol', a word for the number represented by 1 followed by 100 zeros. After founders - Stanford graduate students Sergey Brin and Larry Page presented their project to an angel investor, they received a cheque made out to 'Google 

SAP 
"Systems, Applications, Products in Data Processing", formed by four ex-IBM employees who used to work in the 'Systems/Applications/Projects' group of IBM. 

Sony
From the Latin word 'sonus' meaning sound, and 'sonny' a slang used by Americans to refer to a bright youngster.