Apple's iMac was three years old on August 15, and Apple has posted a selection of letters from users about iMac's impact on their lives.

Letters come from users across the planet. Some discuss how Apple's consumer computer helped them through serious illness, others how it helped their career. Messages come from a variety of different age groups, professions and nationalities.

Users have taken iMac through the gamut of what it's capable of - from graphic design, to Internet browsing, to placing it at the centre of their entertainment system.

Apple's got four pages of excerpts from iMac owner's messages online.