A man using a Casio AL 1000 desktop calculator in an office of the ship repairers R. & H. Green & Silley Weir Ltd., London. He is working with figures taken from a foolscap notebook which has the date 4.2.71 at the top of the page. This appears to be in a design office as on the desk are a plan of a midship section of a large vessel and various mathematical instruments, including dividers, set square, plastic ruler and a slide rule.