LONDON – Two legendary companies in the music industry are to meet today in a London courtroom to fight it out over what might be the world’s most recognizable logo: A simple piece of fruit. Apple Corps Limited, the Beatles’ record company and guardian of the band’s musical heritage and business interests, is suing Apple Computer Incorporated, claiming the company violated a 1991 agreement by entering the music business with its i-Tunes online music store.

At issue is a 1991 pact that ended a long-running trademark fight between the two Apples in which each agreed not to tread on the other’s toes by entering into a “field of use” agreement over the trademark.

Apple Computer said in a statement that “unfortunately, Apple and Apple Corps now have differing interpretations of this agreement and will need to ask a court to resolve this dispute.”

Apple Corps – founded in 1968 and owned by surviving Beatles Paul McCartney and Ringo Starr, the widow of John Lennon and the estate of George Harrison – is seeking both an injunction to enforce the 1991 agreement and monetary damages for the alleged contract breach.

The computer company’s logo is a cartoonish apple with a neat bite out of the side; the record company is represented by a perfect, shiny green Granny Smith apple.

Apple Computer had asked to have the case heard in California, where it is based, but Judge Martin Mann rejected that application in 2004 and ordered the case be heard at the stately Royal Courts of Justice in London.

Apple Computer was formed in 1976, when two college dropouts – Steve Jobs and Steve Wozniak – filed partnership papers on April Fools’ Day.